Send DTMF tones for dialing call

Fallback to active call only if outgoing call is not present.

Bug: 18224969
Change-Id: Ic3238bf539fe2188dce8ed4010652a6fc26a6435
Merge remote-tracking branch 'aosp/lollipop-release' into HEAD
InCallUI: deblur fab_(red|blue).png

Zigzag edges.

Change-Id: I6a0861aed5aacfe23a573d0161afe971707bd154