Stop screensaver on incoming phone call.

Use notification manager as an indicator of when to stop the screensaver
due to immediately-needed user interaction.

Any notification with a fullScreenIntent will now exit the screensaver.

Bug: 6976796
Change-Id: Id91cd4c32f3fad018b56f4dfe24b37110bab32d8

Author: John Spurlock

services/java/com/android/server/NotificationManagerService.java

@@ -51,6 +51,7 @@
 import android.os.UserId;
 import android.os.Vibrator;
 import android.provider.Settings;
+import android.service.dreams.IDreamManager;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.util.AtomicFile;
@@ -148,6 +149,8 @@ public class NotificationManagerService extends INotificationManager.Stub
     private AtomicFile mPolicyFile;
     private HashSet<String> mBlockedPackages = new HashSet<String>();
 
+    private IDreamManager mSandman;
+
     private static final int DB_VERSION = 1;
 
     private static final String TAG_BODY = "notification-policy";
@@ -634,6 +637,8 @@ public void update() {
     void systemReady() {
         mAudioService = IAudioService.Stub.asInterface(
                 ServiceManager.getService(Context.AUDIO_SERVICE));
+        mSandman = IDreamManager.Stub.asInterface(
+                ServiceManager.getService("dreams"));
 
         // no beeping until we're basically done booting
         mSystemReady = true;
@@ -972,6 +977,16 @@ public void enqueueNotificationInternal(String pkg, int callingUid, int callingP
                         | Notification.FLAG_NO_CLEAR;
             }
 
+            // Stop screensaver if the notification has a full-screen intent.
+            // (like an incoming phone call)
+            if (notification.fullScreenIntent != null && mSandman != null) {
+                try {
+                    mSandman.awaken();
+                } catch (RemoteException e) {
+                    // noop
+                }
+            }
+
             if (notification.icon != 0) {
                 StatusBarNotification n = new StatusBarNotification(pkg, id, tag,
                         r.uid, r.initialPid, score, notification);