Merge "FakePermissionEnforcer: provide a revokeAll method" am: b46adf6c75

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2578470

Change-Id: Ia262f1063a987689bac88ad55887a0b55d83365d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>