[automerger skipped] [RESTRICT AUTOMERGE][pm] still allow debuggable for system app downgrades am: 8e804c13ab -s ours am: 67b3147597 -s ours am: 4ae5cc14ea -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21266751

Change-Id: Ic2f7654aefaaa224052c64f69a240b10426d0ee0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>