Fix uri permission grant on remote bug report uri

System server is no longer allowed to grant uri permission directly. As a result
we use grantUriPermissionFromIntent() to grant permission from the shell UID,
who is the owner of the bug report content.

Also fix a security bug where the broadcast to notify user consent of remote
bug report mismatches the <protected-broadcast> definition, causing it to be
sendable by anyone.

Bug: 34159108
Test: manual - Install TestDPC and request bugreport, try accept and decline
      once the report is ready (Bullhead).

Merged-In: I66e3f2a16d4547549f09d3c96d52aed2330caedf
Change-Id: I66e3f2a16d4547549f09d3c96d52aed2330caedf