[automerger skipped] [RESTRICT AUTOMERGE][pm] still allow debuggable for system app downgrades am: 62e086ad0e -s ours am: 170b5d95f4 -s ours am: 8257c5af17 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21261266

Change-Id: I62828cdecfaf57143ffd9e397acbcf42d1fa597f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>