audioservice: always acquire wake lock as AudioService

When a wake lock is aquired while executing a binder call and released
in the message handler, AppOps complains about the uid mismatch.

Clear the binder identity before acquiring the wake lock.

Bug: 10627124.
Change-Id: Ibd5babc1ae699bffde1a659562089eb091879106

1 files changed, 4 insertions, 0 deletions

diff --git a/media/java/android/media/AudioService.java b/media/java/android/media/AudioService.java
index 3425c91..84ea4c9 100644
--- a/media/java/android/media/AudioService.java
+++ b/media/java/android/media/AudioService.java
@@ -2687,7 +2687,11 @@ public class AudioService extends IAudioService.Stub {
      */
     private void queueMsgUnderWakeLock(Handler handler, int msg,
             int arg1, int arg2, Object obj, int delay) {
+        final long ident = Binder.clearCallingIdentity();
+        // Always acquire the wake lock as AudioService because it is released by the
+        // message handler.
         mAudioEventWakeLock.acquire();
+        Binder.restoreCallingIdentity(ident);
         sendMsg(handler, msg, SENDMSG_QUEUE, arg1, arg2, obj, delay);
     }