Allow apps to bypass Power Save restrictions when launched from a Notification's PendingIntent.

This scenario typically happens when the device is on Doze Mode and a
notification action is triggered from a Wear device.

In a nutshell, the workflow is:

- ProcessRecord has a flag telling whether a process has "whitelist
  management" privileges.
- When NotificationManager binds a new NotificationListenerService, it
  sets the BIND_ALLOW_WHITELIST_MANAGEMENT flag.
- On bind(), ActiveService asserts that only system apps can set that
  flag.
- On computeOomAdjLocked(), ActivityManagerService sets the
  ProcessRecord flag if necessary.
- Upon creating a notification, NotificationManager calls AM to mark its
  PendingIntents as coming from a notification.
- When PendingIntentRecord sends it to the target, it checks if it's
  from a notification and if so calls AM to do the temp whitelist.
- On unbind(), ActiveService removes the ProcessRecord flag if necessary.

Fixes: 28818704

Change-Id: I00d46036a2cbb73f7f733fd35bf0b743a02807a1
diff --git a/core/java/android/app/ActivityManagerInternal.java b/core/java/android/app/ActivityManagerInternal.java
index 4b8d9ee..3a70a4c 100644
--- a/core/java/android/app/ActivityManagerInternal.java
+++ b/core/java/android/app/ActivityManagerInternal.java
@@ -18,6 +18,7 @@
 
 import android.annotation.NonNull;
 import android.content.ComponentName;
+import android.content.IIntentSender;
 import android.os.IBinder;
 import android.service.voice.IVoiceInteractionSession;
 
@@ -144,4 +145,10 @@
      * Kill foreground apps from the specified user.
      */
     public abstract void killForegroundAppsForUser(int userHandle);
+
+    /**
+     *  Sets how long a {@link PendingIntent} can be temporarily whitelist to by bypass restrictions
+     *  such as Power Save mode.
+     */
+    public abstract void setPendingIntentWhitelistDuration(IIntentSender target, long duration);
 }
diff --git a/core/java/android/app/ActivityManagerNative.java b/core/java/android/app/ActivityManagerNative.java
index cd9a05b..f12c284 100644
--- a/core/java/android/app/ActivityManagerNative.java
+++ b/core/java/android/app/ActivityManagerNative.java
@@ -6966,8 +6966,8 @@
         reply.recycle();
     }
 
-    public void notifyLockedProfile(@UserIdInt int userId) throws RemoteException
-    {
+    @Override
+    public void notifyLockedProfile(@UserIdInt int userId) throws RemoteException {
         Parcel data = Parcel.obtain();
         Parcel reply = Parcel.obtain();
         data.writeInterfaceToken(IActivityManager.descriptor);
@@ -6978,6 +6978,7 @@
         reply.recycle();
     }
 
+    @Override
     public void startConfirmDeviceCredentialIntent(Intent intent) throws RemoteException {
         Parcel data = Parcel.obtain();
         Parcel reply = Parcel.obtain();
@@ -6989,6 +6990,7 @@
         reply.recycle();
     }
 
+    @Override
     public int sendIntentSender(IIntentSender target, int code, Intent intent, String resolvedType,
             IIntentReceiver finishedReceiver, String requiredPermission, Bundle options)
             throws RemoteException {
diff --git a/core/java/android/content/Context.java b/core/java/android/content/Context.java
index b758868..108350a 100644
--- a/core/java/android/content/Context.java
+++ b/core/java/android/content/Context.java
@@ -285,6 +285,12 @@
     public static final int BIND_ADJUST_WITH_ACTIVITY = 0x0080;
 
     /**
+     * @hide Flag for {@link #bindService}: allows application hosting service to manage whitelists
+     * such as temporary allowing a {@code PendingIntent} to bypass Power Save mode.
+     */
+    public static final int BIND_ALLOW_WHITELIST_MANAGEMENT = 0x01000000;
+
+    /**
      * @hide Flag for {@link #bindService}: Like {@link #BIND_FOREGROUND_SERVICE},
      * but only applies while the device is awake.
      */
diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 0bc514e..f867fb0 100755
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -60,8 +60,8 @@
 import android.util.ArrayMap;
 import android.util.ArraySet;
 import android.util.Log;
-
 import android.util.MemoryIntArray;
+
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.widget.ILockSettings;
@@ -7950,6 +7950,7 @@
          * idle_factor                      (float)
          * min_time_to_alarm                (long)
          * max_temp_app_whitelist_duration  (long)
+         * notification_whitelist_duration  (long)
          * </pre>
          *
          * <p>