Merge "AssistContentRequester move binder call to background thread." into sc-dev am: 8c46bba98e am: b41c1ee1c2

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

Change-Id: Icd6601f895842048e0f2e85900fb825558a1b3a4