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

* commit 'b2060d8c6d3207acfc2b7b01ed9e665fb891e8b9':
  Add Null check for CanAddCall.
tree: 05d70582f1e3af2111c6d1b98a5d81efad8f2176
  1. InCallUI/