This adds support for capturing to a texture in the Java part of VideoCapturerAndroid. After this cl, the C++ also needs modification. https://codereview.webrtc.org/1375953002/ contains the idea and have a working version where textures can be rendered in local preview. BUG=webrtc:4993 R=magjed@webrtc.org Review URL: https://codereview.webrtc.org/1383413002 . Cr-Commit-Position: refs/heads/master@{#10213}