tree 7c3b5e22ac0069910999f02e4075ae957ea376e8
parent 4d113b71aa155ba99556ce64c505831c486834a6
author Qi Wang <wangqi@google.com> 1456527125 -0800
committer Qi Wang <wangqi@google.com> 1456537187 -0800

Add back button for dialpad in incallui.

Back icon resource:
https://icons.googleplex.com/#icon=ic_arrow_back

Bug: 27231038
Change-Id: Ia98f640b31322a4eda56998b5624637ea1699ed8