[automerger skipped] Disallow system apps to be installed/updated as instant. am: 0d0f185c0d am: f5343e35dc am: c1be019b9d -s ours am: 3a6449fdd5 -s ours

am skip reason: Merged-In Idd89a6dd72f0e68259095f677185f0494391025c with SHA-1 c61ee9f452 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/25716266

Change-Id: Ic72706023dc5cd25535b0a01d07be45c688ffc3c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>