Cache LocalCallingIdentity across FUSE requests

We now listen for app op changes for packages and invalidate the
LocalCallingIdentity cache entry for the uid.

Additionally, we invalidate the cache entry on any package changes
like install/uninstall for the uid.

Test: Manual
Bug: 148904081
Change-Id: I9811efca7af223eaf99e28c79a948eca41579dbe
2 files changed