am 2fda254b: Merge "Send a stopDtmf() on click for talkback." into lmp-dev

* commit '2fda254bf9d57859945675392193cac1027671b2':
  Send a stopDtmf() on click for talkback.
tree: aa1e90d197d8f95b620f54c54ec313d72b5b6175
  1. InCallUI/