Merge "Sharesheet - Don't update list on bg thread" into rvc-dev am:...

Merge "Sharesheet - Don't update list on bg thread" into rvc-dev am: a4d5e8c9 am: c79feca6 am: 65a921bc am: a0e4a692

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11884197

Change-Id: Ic1d4af3a92834245168c071307281acd69f58ba5