Merge "Sharesheet - Don't update list on bg thread" into rvc-dev am: a4d5e8c9 am: 930b36cc am: bd19b8c4

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

Change-Id: I01f507f7bfdcd0121d64964d1d2c3704a80ef5e1