Bug 834530 - Import fixes for audible tones, dialtones and tactile feedback from the shared dialer r=drs
Bug 834530 - Make the TonePlayer handle the channel sounds will be played on r=drs
Merge pull request #25778 from gabrielesvelto/bug-834530-emergency-dtmf

Bug 834530 - Improvements to the emergency and dialer keypad touch tones