Clear calling identity when executing the callback

Callbacks need to be executed within Binder.clearCallingIdentity() since user code executed
in the callback should be with the calling pid/uid of the app, not the system.
Bug: 117795921
Test: Manually tested on eSIM operations

Change-Id: Ie50315e3fd287559ed516a24de09af6707c03d2f
Merged-In: Ie50315e3fd287559ed516a24de09af6707c03d2f
1 file changed