Improves framework logging for user management.

1. Makes sure ActivityServices passed the callingPackage for logging. That
way when someone with lack of permissions calls bindServiceAsUser, we will
know at least which package is calling it.
2. Adds more logging to UserManagerService for user removal and creation

Fixes: 110999053
Test: Flash device, use adb to remove users and verify logging. Made sure that
bindServiceAsUser permission denial prints the name of the package.

Change-Id: Ieab750fdb6aee04f3880625374a9ab3633e76bc4