ed6e077263
This change makes the Java classes and constructors for SurfaceTextureHelper and I420Frame public. This allows applications to use the WebRTC CameraVideoCapturer to obtain raw frames, and to render frames on the WebRTC VideoRenderer without having to pass them through a VideoTrack - such as when using Quartc. BUG=None. Review-Url: https://codereview.webrtc.org/2544563002 Cr-Commit-Position: refs/heads/master@{#15344}