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

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

Change-Id: Ide87631eb187f9044422c5e60fb7eeccf8eeb820