[automerger skipped] Disallow system apps to be installed/updated as instant. am: c61ee9f452 am: 20e07a2b92 -s ours

am skip reason: Merged-In Idd89a6dd72f0e68259095f677185f0494391025c with SHA-1 b978fdc30b is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/25715852

Change-Id: I25f5bd9d45011f31a610b6422f1fceb4a8fa8fb7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>