QS: Introduce cast control panel.

Make cast controller more granular, at the route level, and
bind a common detail item panel to the available routes.

Fix tile icon, add connecting label.

Remove dialog presentation, no longer needed.

Add the new empty state, and add controller state to dump.

Found a bug in keyguard when in presentation mode, added
a workaround - don't crash when no owner info in keyguard
status view.

Bug:15833210
Change-Id: I19afec390eac2260bccf4a7064065b666b7bceca