Merge "gtbs: Add Generic Telephone Bearer Service support" am: e1d04447a1

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1942955

Change-Id: I0191a824597dc228986fef86f3f413f499f4e249
tree: f64da96c42d16ce89ea81c5bb6ea48135220fe73
  1. framework/
  2. service/