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

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

Change-Id: Ibe3630f7831221a0ff9d599bf36cf808936d59d5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>