Hide Titlebar while loading InCallUI (1 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: Id1b1f68315c5534d6a368084c89eef08eebd39f5
Merge remote-tracking branch 'carbon/kk' into msoctos2