jiangdg/AndroidCamera关闭摄像头流程

1 MultiCameraClient.closeCamera()
2 MultiCameraClient.MSG_STOP_PREVIEW
2.1 MultiCameraClient.closeCameraInternal()
2.1.1 UVCCamera.destroy()
2.1.1.1 UVCCamera.close()
2.1.1.1.1 UVCCamera.stopPreview()/nativeStopPreview()
2.1.1.1.2 UVCCamera.nativeRelease()
2.1.1.2 UVCCamera.nativeDestroy()
2.2 RenderManager.stopRenderScreen()
2.2.1 RenderManager.MSG_GL_RELEASE
2.2.1.1 AbstractEffect.releaseGLES()
2.2.1.2 CameraRender.releaseGLES()
2.2.1.3 ScreenRender.releaseGLES()
2.2.1.4 CaptureRender.releaseGLES()