Merge "gtbs: Add Generic Telephone Bearer Service support" am: ddcee937c1 am: 66a9d57579 am: 8ef0cb74f7 am: ab91a34e7c

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

Change-Id: I5d7016014182677983832415bbdf603ddd98310f