Add support for Generic Telephone Bearer service (GTBS)

This patch integrates Telecomm service to GTBS

Bug: 150670922
Tag: #feature
Sponsor: jpawlowski@
Test: atest BluetoothInstrumentationTests TelecomUnitTests
Change-Id: Idb94f73aa39757d6ad8a90a6a12f47c5491f9a0d
8 files changed