base

Fix issue #11536426 DO NOT MERGE

Permission denied when trying to launch an activity from a notification

We don't remove pending intents when updating an app, which is necessary
to keep app widgets and other things working.  However, when uninstalling
an app, we should clear out all of its pending intents.

Change-Id: I95067b31098115b5a7b127766fd093750063bbb8