Merge "Sharesheet - Don't update list on bg thread" into rvc-dev am: a4d5e8c9b7 am: c79feca6e3 am: 65a921bc91

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

Change-Id: Id4f61fe25d956eb11f68120d3a709196af0ebca5