am de55de18: am 4fc5703d: Merge "Add hold button for video calling." into lmp-mr1-dev

* commit 'de55de18553f571c3e451e4b10005c68b9e43c17':
  Add hold button for video calling.
tree: fcde179dddae08e7b0ce69f8b5b72c1845689c91
  1. InCallUI/