InCallUI: Stop the running animation before hide the icon

There is a running alpha animation on the state icon,
so it can be shown.

Before hide the state icon, clear it's animation firstly
and do not start animation unless it is visible.

CRs-Fixed: 741096

Change-Id: Id14d9f6e8e5d968b9d0497945833f7e6e78e1b06
Base InCallUI theme on material theme.

Not sure what CAF thought when they changed it to Holo...

Change-Id: I2bdc692b782dda8730e9dfb79603951470108dac
Remove video and overflow buttons