Merge "Register callback to statsD for AppSearchStorageInfo" into sc-dev am: 08cb90a18f am: 5c55df1df9 am: 1ba09b4526

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15083854

Change-Id: Icdc9d44b5a54efa1d470f493553e0ab6d272e06c