Expose NetworkScore to external caller am: 39907ba9d6 am: 849c987cf6

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1653938

Change-Id: I807cae8d95e8d5fb1f017b1ba11d800772ba3e9c
tree: c7e453a1472a4dc7348fd3fcc40a64ab85136fab
  1. framework/
  2. service/
  3. OWNERS
  4. TEST_MAPPING