Merge "New pipeline: Separate stability rules for group pruning from group...

Merge "New pipeline: Separate stability rules for group pruning from group changing" into tm-dev am: baafc8b1 am: 1310baf2 am: 4290ceb7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18030065



Change-Id: I489165b95d312ab8d8e13deda2eb661a157bedd9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>