Make EuiccService un-disable-able.

Disabling the eSIM Manager could leave the device in a bad state, unable
to address the eSIM, and possibly crash due to EuiccConnector failing to
find an LPA to implement EuiccService. So here we do not allow users to
disable this component.

Fixes: 135644632
Test: robotest
Change-Id: Ia4ea48b449f121edaff10531b7c975b09432a8f8

src/com/android/settings/applications/ApplicationFeatureProviderImpl.java

@@ -33,6 +33,7 @@ import android.text.TextUtils;
 import android.util.ArraySet;
 
 import com.android.internal.telephony.SmsApplication;
+import com.android.internal.telephony.euicc.EuiccConnector;
 import com.android.settings.R;
 
 import java.util.ArrayList;
@@ -141,6 +142,12 @@ public class ApplicationFeatureProviderImpl implements ApplicationFeatureProvide
             keepEnabledPackages.add(defaultSms.getPackageName());
         }
 
+        // Keep Euicc Service enabled.
+        final ComponentInfo euicc = EuiccConnector.findBestComponent(mPm);
+        if (euicc != null) {
+            keepEnabledPackages.add(euicc.packageName);
+        }
+
         keepEnabledPackages.addAll(getEnabledPackageWhitelist());
 
         final LocationManager locationManager =

tests/robotests/src/com/android/settings/applications/ApplicationFeatureProviderImplTest.java

@@ -27,6 +27,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ApplicationInfo;
+import android.content.pm.ComponentInfo;
 import android.content.pm.IPackageManager;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
@@ -36,11 +37,12 @@ import android.os.Build;
 import android.os.UserHandle;
 import android.os.UserManager;
 
-import com.android.settings.R;
+import com.android.internal.telephony.euicc.EuiccConnector;
 import com.android.settings.testutils.ApplicationTestUtils;
 import com.android.settingslib.testutils.shadow.ShadowDefaultDialerManager;
 import com.android.settingslib.testutils.shadow.ShadowSmsApplication;
 
+import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -49,6 +51,8 @@ import org.mockito.MockitoAnnotations;
 import org.robolectric.RobolectricTestRunner;
 import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Config;
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
 import org.robolectric.shadows.ShadowApplication;
 import org.robolectric.util.ReflectionHelpers;
 
@@ -105,6 +109,12 @@ public final class ApplicationFeatureProviderImplTest {
                 mPackageManagerService, mDevicePolicyManager);
     }
 
+    @After
+    @Config(shadows = {ShadowEuiccConnector.class})
+    public void tearDown() {
+        ShadowEuiccConnector.reset();
+    }
+
     private void verifyCalculateNumberOfPolicyInstalledApps(boolean async) {
         setUpUsersAndInstalledApps();
 
@@ -282,6 +292,33 @@ public final class ApplicationFeatureProviderImplTest {
         assertThat(keepEnabledPackages).containsAllIn(expectedPackages);
     }
 
+    @Test
+    @Config(shadows = {ShadowSmsApplication.class, ShadowDefaultDialerManager.class,
+            ShadowEuiccConnector.class})
+    public void getKeepEnabledPackages_hasEuiccComponent_shouldContainEuiccPackage() {
+        final String testDialer = "com.android.test.defaultdialer";
+        final String testSms = "com.android.test.defaultsms";
+        final String testLocationHistory = "com.android.test.location.history";
+        final String testEuicc = "com.android.test.euicc";
+
+        ShadowSmsApplication.setDefaultSmsApplication(new ComponentName(testSms, "receiver"));
+        ShadowDefaultDialerManager.setDefaultDialerApplication(testDialer);
+        final ComponentInfo componentInfo = new ComponentInfo();
+        componentInfo.packageName = testEuicc;
+        ShadowEuiccConnector.setBestComponent(componentInfo);
+
+        // Spy the real context to mock LocationManager.
+        Context spyContext = spy(RuntimeEnvironment.application);
+        when(mLocationManager.getExtraLocationControllerPackage()).thenReturn(testLocationHistory);
+        when(spyContext.getSystemService(Context.LOCATION_SERVICE)).thenReturn(mLocationManager);
+
+        ReflectionHelpers.setField(mProvider, "mContext", spyContext);
+
+        final Set<String> keepEnabledPackages = mProvider.getKeepEnabledPackages();
+
+        assertThat(keepEnabledPackages).contains(testEuicc);
+    }
+
     @Test
     @Config(shadows = {ShadowSmsApplication.class, ShadowDefaultDialerManager.class})
     public void getKeepEnabledPackages_shouldContainSettingsIntelligence() {
@@ -354,4 +391,23 @@ public final class ApplicationFeatureProviderImplTest {
         resolveInfo.activityInfo = activityInfo;
         return resolveInfo;
     }
+
+    @Implements(EuiccConnector.class)
+    public static class ShadowEuiccConnector {
+
+        private static ComponentInfo sBestComponent;
+
+        @Implementation
+        protected static ComponentInfo findBestComponent(PackageManager packageManager) {
+            return sBestComponent;
+        }
+
+        public static void setBestComponent(ComponentInfo componentInfo) {
+            sBestComponent = componentInfo;
+        }
+
+        public static void reset() {
+            sBestComponent = null;
+        }
+    }
 }