Extract shortcuts loading logic from ChooserActivity am: 7697b5f3b4

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/IntentResolver/+/20489942

Change-Id: Id44b8b06fa0886eb74fa63af0cad523fdda5ca11
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>