Merge "AssistContentRequester move binder call to background thread." into sc-dev am: 8c46bba98e am: dde88a739e am: 1eeb4c9586

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

Change-Id: I6c5bd9da04c5efade33a839b783961c5bc007f6e