Merge "Hold the reference of TelephonyCallback" into tm-dev am: 76de9f1e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17946240



Change-Id: I9f8f41fe65e05d78b1755a57757d352b644e1bdc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>