Add Telecom events for local ringback.

Adding telecom events for start/stop of local ringback.

Test: Manual
Fixes: 77853172
Merged-In: I68434ff58b32f12e4daa70687190b53f995a11ae
Change-Id: I68434ff58b32f12e4daa70687190b53f995a11ae
(cherry picked from commit 361b2f1f3457bacf50ceaf20b2aec1756b98d5ab)
2 files changed