Fix the settings panel freeze

When one of the list items are selected from the settings panel
then the whole panel freezes until either the app is restarted or
the entries are long clicked.

This is reproducible on any HDPI devices even with the Official
Gallery app from Google.

Change-Id: Ifc8b6703dbc698d288a5163ff2d3ce20decf254d
Camera: properly detect multiple cameras when using the camcorder

Currently, the option to switch between front and rear cameras is
available whether or not the device has multiple cameras. It does
work correctly when in camera (still) mode , the bug only happens
in the video camera.

Change-Id: I66d1a01ff496ed03544049bd1d03881fbef3a07f
Camera: port additional settings from jellybean 4.1 (Round 2)

- add touch-to-focus timeout duration settings
- add volume button zoom controls to camera and camcorder
  (Panorama does not support zooming)

Change-Id: Ib2c2c152a52b2616dd0da6f071f572d34fe64065