Video Recording with Hardware Encoding Test

A test project for recording video and audio with hardware encoding in Android platform. Now there maybe bugs. Please tell me if you find one.

To do list:

1. Scale and scissor the preview interface
2. Clean code
3. Compatibility Test

Reference project:

1. Google's grafika project https://github.com/google/grafika
2. Google's CTS code
3. OnlyInAmerica's project https://github.com/OnlyInAmerica/HWEncoderExperiments