Clean up CameraActivity. Add Flash Support to Camera. Fix Touch sound on VIews

1. Rethought the exif stuff a little bit. Realized,
Camera.Parameters.Rotation was not being set. This will automatically
add the required exif info to the file. No need to use Exif interface
here.
2. Changed on picture taken to load the saved file (if there is one),
and return that. Did this because TiBlob,blobFromData doesn't know
anything about Orientation
3. Add support for Camera Flash. Added Constants for Flash. Fixed
autofocus issue. Setting autofocus paramaters along with flash = auto
causes the camera activity to crash.
4. Update TiUIView to turn off the Android touch sound on a view where
touchenabled = false. Side Note: Developers will need to be wary of
settings this on iOS as setting touchenabled of a view container, makes
all children non-touchable. Not true in Android