Merge "Port appsearch-service to the system_server_current sdk." into sc-dev am: e665d39f am: b1cc6239 am: a0f9f4e8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14638445

Change-Id: Ia71dce0ada74bb13c1eadfcb2f560e3127ec021b