Update notes for submitted changes

* camera: Add workaround for broken video snapshots
* camera: Set extra ZSL parameter
* camera: Add new picture sizes for N1
* camera: Add parameter debugging support
* Camera: Add checker for null pointer exception during camera release
* Gallery2: Clear the undefined buffer for the first 15 frames
* Gallery2: Recycle the image when activity is about to close
* Gallery2: fix the size displayed error of livesnapshot exif
* Camera: Request for 2 snapshots in HDR Mode.
* Camera: set default focus and metering areas to null.