Add system app check for anomaly detection.

In this CL, don't blame system app in anomaly detection and also
add log for it.

Following CL will update it to also check whether this system app
has launch entry.

Bug: 77477987
Test: RunSettingsRoboTests
Change-Id: I97490b32bc42ec2f8e03ec2d82f7c8bf89f9c66f

src/com/android/settings/fuelgauge/BatteryUtils.java

@@ -25,7 +25,9 @@ import android.os.BatteryManager;
 import android.os.BatteryStats;
 import android.os.Bundle;
 import android.os.Build;
+import android.os.Process;
 import android.os.SystemClock;
+import android.os.UserHandle;
 import android.os.UserManager;
 import android.support.annotation.IntDef;
 import android.support.annotation.Nullable;
@@ -43,6 +45,7 @@ import com.android.settings.R;
 import com.android.settings.fuelgauge.anomaly.Anomaly;
 import com.android.settings.overlay.FeatureFactory;
 
+import com.android.settingslib.fuelgauge.PowerWhitelistBackend;
 import com.android.settingslib.utils.PowerUtil;
 
 import java.lang.annotation.Retention;
@@ -531,5 +534,40 @@ public class BatteryUtils {
 
         return false;
     }
+
+    /**
+     * Return {@code true} if we should hide anomaly app represented by {@code uid}
+     */
+    public boolean shouldHideAnomaly(PowerWhitelistBackend powerWhitelistBackend, int uid) {
+        final String[] packageNames = mPackageManager.getPackagesForUid(uid);
+        if (ArrayUtils.isEmpty(packageNames)) {
+            // Don't show it if app has been uninstalled
+            return true;
+        }
+
+        return isSystemUid(uid) || isSystemApp(mPackageManager, packageNames)
+                || powerWhitelistBackend.isSysWhitelistedExceptIdle(packageNames);
+    }
+
+    private boolean isSystemUid(int uid) {
+        final int appUid = UserHandle.getAppId(uid);
+        return appUid >= Process.ROOT_UID && appUid < Process.FIRST_APPLICATION_UID;
+    }
+
+    private boolean isSystemApp(PackageManager packageManager, String[] packageNames) {
+        for (String packageName : packageNames) {
+            try {
+                final ApplicationInfo info = packageManager.getApplicationInfo(packageName,
+                        0 /* flags */);
+                if ((info.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
+                    return true;
+                }
+            } catch (PackageManager.NameNotFoundException e) {
+                Log.e(TAG, "Package not found: " + packageName, e);
+            }
+        }
+
+        return false;
+    }
 }
 

src/com/android/settings/fuelgauge/batterytip/AnomalyDetectionJobService.java

@@ -30,6 +30,7 @@ import android.content.ComponentName;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
+import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.os.Bundle;
 import android.os.Process;
@@ -145,21 +146,24 @@ public class AnomalyDetectionJobService extends JobService {
                     : Settings.Global.getInt(contentResolver,
                             Settings.Global.APP_AUTO_RESTRICTION_ENABLED, ON) == ON;
             final String packageName = batteryUtils.getPackageName(uid);
-            if (uid != UID_NULL && !isSystemUid(uid)
-                    && !powerWhitelistBackend.isSysWhitelistedExceptIdle(
-                    packageManager.getPackagesForUid(uid))) {
-                boolean anomalyDetected = true;
-                if (anomalyInfo.anomalyType
-                        == StatsManagerConfig.AnomalyType.EXCESSIVE_BACKGROUND_SERVICE) {
-                    if (!batteryUtils.isPreOApp(packageName)
-                            || !batteryUtils.isAppHeavilyUsed(batteryStatsHelper, userManager, uid,
-                            policy.excessiveBgDrainPercentage)) {
-                        // Don't report if it is not legacy app or haven't used much battery
-                        anomalyDetected = false;
-                    }
-                }
 
-                if (anomalyDetected) {
+            final boolean anomalyDetected;
+            if (isExcessiveBackgroundAnomaly(anomalyInfo)) {
+                anomalyDetected = batteryUtils.isPreOApp(packageName)
+                        && batteryUtils.isAppHeavilyUsed(batteryStatsHelper, userManager, uid,
+                        policy.excessiveBgDrainPercentage);
+            } else {
+                anomalyDetected = true;
+            }
+
+            if (anomalyDetected) {
+                if (batteryUtils.shouldHideAnomaly(powerWhitelistBackend, uid)) {
+                    metricsFeatureProvider.action(context,
+                            MetricsProto.MetricsEvent.ACTION_ANOMALY_IGNORED,
+                            packageName,
+                            Pair.create(MetricsProto.MetricsEvent.FIELD_CONTEXT,
+                                    anomalyInfo.anomalyType));
+                } else {
                     if (autoFeatureOn && anomalyInfo.autoRestriction) {
                         // Auto restrict this app
                         batteryUtils.setForceAppStandby(uid, packageName,
@@ -215,8 +219,8 @@ public class AnomalyDetectionJobService extends JobService {
         return UID_NULL;
     }
 
-    private boolean isSystemUid(int uid) {
+    private boolean isExcessiveBackgroundAnomaly(AnomalyInfo anomalyInfo) {
-        final int appUid = UserHandle.getAppId(uid);
+        return anomalyInfo.anomalyType
-        return appUid >= Process.ROOT_UID && appUid < Process.FIRST_APPLICATION_UID;
+                == StatsManagerConfig.AnomalyType.EXCESSIVE_BACKGROUND_SERVICE;
     }
 }

tests/robotests/src/com/android/settings/fuelgauge/BatteryUtilsTest.java

@@ -53,6 +53,7 @@ import com.android.settings.R;
 import com.android.settings.fuelgauge.anomaly.Anomaly;
 import com.android.settings.testutils.FakeFeatureFactory;
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settingslib.fuelgauge.PowerWhitelistBackend;
 
 import org.junit.Before;
 import org.junit.Test;
@@ -81,7 +82,7 @@ public class BatteryUtilsTest {
     private static final long TIME_SINCE_LAST_FULL_CHARGE_US =
             TIME_SINCE_LAST_FULL_CHARGE_MS * 1000;
 
-    private static final int UID = 123;
+    private static final int UID = 12345;
     private static final long TIME_EXPECTED_FOREGROUND = 1500;
     private static final long TIME_EXPECTED_BACKGROUND = 6000;
     private static final long TIME_EXPECTED_ALL = 7500;
@@ -141,6 +142,8 @@ public class BatteryUtilsTest {
     private ApplicationInfo mHighApplicationInfo;
     @Mock
     private ApplicationInfo mLowApplicationInfo;
+    @Mock
+    private PowerWhitelistBackend mPowerWhitelistBackend;
     private BatteryUtils mBatteryUtils;
     private FakeFeatureFactory mFeatureFactory;
     private PowerUsageFeatureProvider mProvider;
@@ -166,9 +169,9 @@ public class BatteryUtilsTest {
         when(mBatteryStatsHelper.getStats().computeBatteryRealtime(anyLong(), anyInt())).thenReturn(
                 TIME_SINCE_LAST_FULL_CHARGE_US);
 
-        when(mPackageManager.getApplicationInfo(HIGH_SDK_PACKAGE, PackageManager.GET_META_DATA))
+        when(mPackageManager.getApplicationInfo(eq(HIGH_SDK_PACKAGE), anyInt()))
                 .thenReturn(mHighApplicationInfo);
-        when(mPackageManager.getApplicationInfo(LOW_SDK_PACKAGE, PackageManager.GET_META_DATA))
+        when(mPackageManager.getApplicationInfo(eq(LOW_SDK_PACKAGE), anyInt()))
                 .thenReturn(mLowApplicationInfo);
         mHighApplicationInfo.targetSdkVersion = Build.VERSION_CODES.O;
         mLowApplicationInfo.targetSdkVersion = Build.VERSION_CODES.L;
@@ -570,4 +573,27 @@ public class BatteryUtilsTest {
         assertThat(mBatteryUtils.isAppHeavilyUsed(mBatteryStatsHelper, mUserManager, UID,
                 DISCHARGE_AMOUNT /* threshold */ )).isFalse();
     }
+
+    @Test
+    public void testShouldHideAnomaly_systemApp_returnTrue() {
+        doReturn(new String[]{HIGH_SDK_PACKAGE}).when(mPackageManager).getPackagesForUid(UID);
+        mHighApplicationInfo.flags = ApplicationInfo.FLAG_SYSTEM;
+
+        assertThat(mBatteryUtils.shouldHideAnomaly(mPowerWhitelistBackend, UID)).isTrue();
+    }
+
+    @Test
+    public void testShouldHideAnomaly_systemUid_returnTrue() {
+        final int systemUid = Process.ROOT_UID;
+        doReturn(new String[]{HIGH_SDK_PACKAGE}).when(mPackageManager).getPackagesForUid(systemUid);
+
+        assertThat(mBatteryUtils.shouldHideAnomaly(mPowerWhitelistBackend, systemUid)).isTrue();
+    }
+
+    @Test
+    public void testShouldHideAnomaly_normalApp_returnFalse() {
+        doReturn(new String[]{HIGH_SDK_PACKAGE}).when(mPackageManager).getPackagesForUid(UID);
+
+        assertThat(mBatteryUtils.shouldHideAnomaly(mPowerWhitelistBackend, UID)).isFalse();
+    }
 }

tests/robotests/src/com/android/settings/fuelgauge/batterytip/AnomalyDetectionJobServiceTest.java

@@ -141,6 +141,31 @@ public class AnomalyDetectionJobServiceTest {
                 anyInt(), anyLong());
     }
 
+    @Test
+    public void testSaveAnomalyToDatabase_systemApp_doNotSaveButLog() {
+        final ArrayList<String> cookies = new ArrayList<>();
+        cookies.add(SUBSCRIBER_COOKIES_AUTO_RESTRICTION);
+        mBundle.putStringArrayList(StatsManager.EXTRA_STATS_BROADCAST_SUBSCRIBER_COOKIES, cookies);
+        doReturn(SYSTEM_PACKAGE).when(mBatteryUtils).getPackageName(anyInt());
+        doReturn(false).when(mPowerWhitelistBackend).isSysWhitelisted(SYSTEM_PACKAGE);
+        doReturn(Process.FIRST_APPLICATION_UID).when(
+                mAnomalyDetectionJobService).extractUidFromStatsDimensionsValue(any());
+        doReturn(true).when(mBatteryUtils).shouldHideAnomaly(any(), anyInt());
+
+        mAnomalyDetectionJobService.saveAnomalyToDatabase(mContext, mBatteryStatsHelper,
+                mUserManager, mBatteryDatabaseManager, mBatteryUtils, mPolicy,
+                mPowerWhitelistBackend, mContext.getContentResolver(),
+                mFeatureFactory.powerUsageFeatureProvider,
+                mFeatureFactory.metricsFeatureProvider, mBundle);
+
+        verify(mBatteryDatabaseManager, never()).insertAnomaly(anyInt(), anyString(), anyInt(),
+                anyInt(), anyLong());
+        verify(mFeatureFactory.metricsFeatureProvider).action(mContext,
+                MetricsProto.MetricsEvent.ACTION_ANOMALY_IGNORED,
+                SYSTEM_PACKAGE,
+                Pair.create(MetricsProto.MetricsEvent.FIELD_CONTEXT, ANOMALY_TYPE));
+    }
+
     @Test
     public void testSaveAnomalyToDatabase_systemUid_doNotSave() {
         doReturn(Process.SYSTEM_UID).when(