Merge "[Partial Screensharing] Add abstraction to show custom device policy blockers in ChooserActivity" into tm-qpr-dev am: 814ef64f49

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20139164

Change-Id: I94044049f2d8be9984e8fa110345ca5dd9141a48
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>