Fix RemoteController update in RemoteControlClient registration

A regression was introduced when trying to limit the number of
 internal synchronization generation IDs that caused RCC
 information to be shown only for applications that requested
 audio focus after media button receiver and RCC registration,
 (such as Play Music), not for applications that requested focus
 first (such as Play Movies).
The correct behavior is to always check and update the
 RemoteControllers (seen by MediaFocusControl as RCD interfaces)
 whenever a RemoteControlClient is registered (even if it's a
 re-registration) when it is associated when an entry at the top
 of the remote control stack.

Bug 11657655

Change-Id: I30716e2028f7f718a31e13401b191178735229ff
diff --git a/media/java/android/media/MediaFocusControl.java b/media/java/android/media/MediaFocusControl.java
index 59d411d..34008bb 100644
--- a/media/java/android/media/MediaFocusControl.java
+++ b/media/java/android/media/MediaFocusControl.java
@@ -1930,7 +1930,6 @@
         int rccId = RemoteControlClient.RCSE_ID_UNREGISTERED;
         synchronized(mAudioFocusLock) {
             synchronized(mRCStack) {
-                boolean wasCurrentRcController = isCurrentRcController(mediaIntent);
                 // store the new display information
                 try {
                     for (int index = mRCStack.size()-1; index >= 0; index--) {
@@ -1977,9 +1976,9 @@
                     Log.e(TAG, "Wrong index accessing RC stack, lock error? ", e);
                 }
 
-                // if the eventReceiver is now at the top of the stack but wasn't before
+                // if the eventReceiver is at the top of the stack
                 // then check for potential refresh of the remote controls
-                if (isCurrentRcController(mediaIntent) && !wasCurrentRcController) {
+                if (isCurrentRcController(mediaIntent)) {
                     checkUpdateRemoteControlDisplay_syncAfRcs(RC_INFO_ALL);
                 }
             }//synchronized(mRCStack)