Add immutability flag to PendingIntents Explicitly set FLAG_IMMUTABLE for all PendingIntents in BugreportProgressService. Test: Builds Bug: 170165227 Bug: 171830604 Bug: 178803845 Change-Id: Iae1489b9c8fa323448e60615e99ad96aee1cd1d7 Merged-in: Iae1489b9c8fa323448e60615e99ad96aee1cd1d7 (cherry picked from commit 2d38f6e4f04953a07f80984b50d3efefa64cb374)