Hide Titlebar while loading InCallUI (2 of 2)

The conference call commits a few days ago caused the titlebar to
show when iniating a call during loading. These pair of commits
fix the behavior.

Change-Id: I69a915eef471b5f4ac4da087457cb50fba2e0400
Fix mismerge

Change-Id: If04ed479b243e444b5ff4ef1250c6e2a60d9aea1