Fix NPE in addMessageToConsole.
Fix NPE in addMessageToConsole.

CallbackProxy should always check for client during handleMessage.

Bug: 3060412
Change-Id: I0a84fa2ce21cc46d9b215b18a700119c7c12a7f2

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