Raw data callback

[Serhii-the-Dev]

Encoding JPEG before calling a callback function takes some amount of a precious time and freezing an app. Also it is not suitable for in-place editors, when user makes a shot, applies some filters, and only after that decides to save, or not to save a resulting image.

P.S. Figured it out, it seems like Android does not provide bitmap data in camera callback...Please, correct me if I am wrong, and we can use that raw data callback.