DO NOT MERGE Fix 5389442 RemoteControlClient javadoc
DO NOT MERGE Fix 5389442 RemoteControlClient javadoc

Extend RemoteControlClient class description with an example
 of instance creation showing how the PendingIntent is created
 and how it uses the same ComponentName as the one used
 in AudioManager.registerMediaButtonEventReceiver()

Change-Id: I1af61ddbf5cfb9160ea5b814bed7b881d51b7eff

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base