Merge "Call on urls changed callback when callback added" into rvc-qpr-dev am:...

Merge "Call on urls changed callback when callback added" into rvc-qpr-dev am: 1e722ded am: 8ff7433a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12326661

Change-Id: I5773540682d8827ff5c10bb8e5f2ded9f9246369