1.Add camera test source code and README
Update camera testcase suite
Add enum framesize and flash test code

add enum_framesize ioctl and flash test code
Modify streamoff error
Add testcase

1.add flash testcase
2.add focus testcase
3.add vflip hflip ioctl testcase
4.modify pixformat to YUV420
Continuos mode can dump preview and capture yuv data
Add continuous,still take picture function for primary camera

1.Add continuous mode take picture
2.Add continuous preview then still mode take picture
Modify readme file