Merge "Chooser custom actions API." into tm-qpr-dev am: 6b5f62cac0 am: 7dfc70d66b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20660055

Change-Id: I70e34b7095955ace9322a9e61d50c3e1bba2c2d8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>