Clean up obsolete pending timeout after restoring package metadata

                // of it is process-local and therefore synchronous.  That means that the

                // next-state message (RUNNING_QUEUE) is already enqueued.  Only if we're

                // unable to proceed with running the queue do we remove that pending

                // message and jump straight to the FINAL state.

                // message and jump straight to the FINAL state.  Because this was

                // synchronous we also know that we should cancel the pending timeout

                // message.

                mBackupHandler.removeMessages(MSG_TIMEOUT);

                // Verify that the backup set includes metadata.  If not, we can't do

                // signature/version verification etc, so we simply do not proceed with