Merge "AssistContentRequester move binder call to background thread." into sc-dev am: 8c46bba98e am: dde88a739e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14801431

Change-Id: I6f9f5b23bd07ef54de6f00273a3de03a8c1e327b