check for null members in NotifyHandler
check for null members in NotifyHandler

An unexpected message posted to the queue should not
crash the application.

Bug: 27097094
Change-Id: Ide6a07014660ff14e0f287660c534cfa1e0acad9

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