Migration to bugreport API complete and stable

Remove bugreport API feature flag as it is no longer used.

Test: Full/Interactive bugreport work as expected
Test: `adb bugreport` works as expected
Bug: 139415553
Bug: 133494536
Change-Id: I4d6c66a6b101d14336dca459a3aba8e02dbca675
2 files changed