Camera2: Add proper support for SuperZoom

* Surface this as an actual option, since it acts more like a scene mode
  similar to HDR.

Change-Id: I386f39fa960efb0f3985ed3b8660b19f720f4720
Camera2: Show post-picture spinner for slow shutter

Change-Id: I1e1eefd5731ee83a70a5270de0c254ec2deebd85
Camera2: Surface Qualcomm HFR setting

* Also fix HFR variable naming

Change-Id: Ibcf43da1d7e2ae0f22f13718f16c3e3fe8debad8