Make sure onPostExecute() is never called after cancel() Bug #5651553
Make sure onPostExecute() is never called after cancel()
Bug #5651553

As dfined by the documentation.

Change-Id: I627a49ee000d6990b61fd64dde9b06f72cd5cbae

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