Stop ringtone when user opens "respond via message" option

Ringtone should be stopped if user uses the "respond via message"
option because user already notices the incoming call and user
just feels the ringtone is noisy.

Author: Takeshi Tanigawa <takeshi.tanigawa@sonymobile.com>
Bug: 63089671
Test: AnswerFragmentTest
PiperOrigin-RevId: 174249368
Change-Id: I2c6353cd662f23c20ac3ce873c38f18e8378b0a9
1 file changed