fb: add remote view tile (1/2)

Thanks CM for the base for it....just adapted it to our QS

Change-Id: Ied1dc1191e8aacb579046413dc2b12b1a634367f
QuickSettings : Register/unregister cast tile one time

Don't do these operations every time the parent is visible/invisible,
it causes jank.

Repro:

Turn on wifi on a network w/ chromecast
Swipe down quick settings panel really fast

Change-Id: I3dfcd3610abe96e1bfdab06ef3b876ccf5140ceb