Add restrict app detail page

1. Move force standby action to BatteryUtils
2. Add click action for restricted preference(go to detail page)
3. Build app list in detail page using packageOps list

Bug: 71502850
Test: RunSettingsRoboTests
Change-Id: I1e6733e5402e7a854b07a8bbb43a86255276bfaa

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

@@ -20,9 +20,11 @@ package com.android.settings.fuelgauge;
 import android.app.AppOpsManager;
 import android.content.Context;
 import android.support.annotation.VisibleForTesting;
+import android.support.v14.preference.PreferenceFragment;
 import android.support.v7.preference.Preference;
 
 import com.android.settings.R;
+import com.android.settings.SettingsActivity;
 import com.android.settings.applications.LayoutPreference;
 import com.android.settings.core.BasePreferenceController;
 
@@ -37,12 +39,21 @@ public class RestrictAppPreferenceController extends BasePreferenceController {
 
     private AppOpsManager mAppOpsManager;
     private List<AppOpsManager.PackageOps> mPackageOps;
+    private SettingsActivity mSettingsActivity;
+    private PreferenceFragment mPreferenceFragment;
 
     public RestrictAppPreferenceController(Context context) {
         super(context, KEY_RESTRICT_APP);
         mAppOpsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
     }
 
+    public RestrictAppPreferenceController(SettingsActivity settingsActivity,
+            PreferenceFragment preferenceFragment) {
+        this(settingsActivity.getApplicationContext());
+        mSettingsActivity = settingsActivity;
+        mPreferenceFragment = preferenceFragment;
+    }
+
     @Override
     public int getAvailabilityStatus() {
         return AVAILABLE;
@@ -51,13 +62,27 @@ public class RestrictAppPreferenceController extends BasePreferenceController {
     @Override
     public void updateState(Preference preference) {
         super.updateState(preference);
+
         mPackageOps = mAppOpsManager.getPackagesForOps(
                 new int[]{AppOpsManager.OP_RUN_ANY_IN_BACKGROUND});
         final int num = mPackageOps != null ? mPackageOps.size() : 0;
 
+        // Enable the preference if some apps already been restricted, otherwise disable it
+        preference.setEnabled(num > 0);
         preference.setSummary(
                 mContext.getResources().getQuantityString(R.plurals.restricted_app_summary, num,
                         num));
     }
 
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        if (getPreferenceKey().equals(preference.getKey())) {
+            // start fragment
+            RestrictedAppDetails.startRestrictedAppDetails(mSettingsActivity, mPreferenceFragment,
+                    mPackageOps);
+            return true;
+        }
+
+        return super.handlePreferenceTreeClick(preference);
+    }
 }