Add CarrierConfig to displaying HD audio indicator for GSM/CDMA calls

This causes UI to display HD audio indicator even in GSM/CDMA calls.
This feature is necessary to fulfill some carriers requirement.

Test: manual - Checked that HD audio indicator for GSM/CDMA calls can be
controlled by carrier config.
Bug: 30207043

Change-Id: I57298d8813a5cc53110af02a369af144136f7fc9
1 file changed