Updates menus after provisioning changes

Starts to listen for provisioning changes in mobile network menu and
Call Settings menu. The UI is then updated if provisioning status
changes for Wi-Fi Calling, Enhanced 4G LTE mode or video calling.

This ensures that the Wi-Fi Calling, Enhanced 4G LTE mode and video
calling items in these menus is added/removed correctly immediately
after provisioning changes.

Bug: 119389855
Test: atest TeleServiceTests
Merged-In: Ic4c4d07a2935fcd8d983481722ce1a9437fda7c4
Change-Id: Ic4c4d07a2935fcd8d983481722ce1a9437fda7c4
2 files changed