MWI: Update modules that subscribe to MWI to use new API calls

The MWI core recently got some new API calls that make tracking MWI state
lifetime more reliable. This patch updates those modules that subscribe to
specific MWI topics to use the new API. Specifically, these modules now
subscribe to both MWI topics and MWI state.

ASTERISK-28442

Change-Id: I32bef880b647246823dbccdf44a98d384fcabfbd