Camera: add additional ISO modes

Change-Id: I3460c3de4cbef467430673146a9ddb2fdc8f5032
Camera: Video HDR Feature Integration.

Added framework support for camera applications to query supported
video HDR modes and set the required mode.

Change-Id: Ic6bf021708dd836a25453dd80479a7e81cd9adbd
Merge changes Ic6bf0217,I3460c3de into du44

* changes:
  Camera: Video HDR Feature Integration.
  Camera: add additional ISO modes