- Exit from a camera thread lopper loop() method only after all camera release calls are completed. This fixes camera exceptions observed from time to time when calling camera functions on a terminated looper.
- Allocate real texture for camera preview.
- Add fps and camera frame duration logging.
- Get camera frame timestamp in Java code and pass it to jni code  so the frame timestamp is assigned as soon as possible. Jni code will not use these timestamps yet until timestamp ntp correction and zeroing in webrtcvideengine.cc will be addressed.

R=fischman@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/16729004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6513 4adac7df-926f-26a2-2b94-8c16560cd09d