am 7dfe2ab5: am b2060d8c: am cbaa95b6: Add Null check for CanAddCall.

* commit '7dfe2ab5b5de726f6dd93547b2356a8083796e5a':
  Add Null check for CanAddCall.
tree: a8a6a53e7051f0da5bb9687f3467754f5bcdcbbb
  1. InCallUI/