Camera and Audio updates

* 1080p and 720p audio bitrate boosted to 288k
* 1080p and 720p audio channels changed to stereo
* 1080p video bitrate boosted to 20mbps
* 720p video bitrate boosted to 12mbps
* Image decoding memory cap doubled from 20mb to 40mb

Signed-off-by: Rohan Mathur <rohanmathur34@gmail.com>