This CL simplifies the VideoCapturer interface from 'String getSupportedFormatsAsJson() throws JSONException' to 'List<CaptureFormat> getSupportedFormats()'. The intermediate conversion to/from a JSON string is removed, and AndroidVideoCapturerJni converts the Java list to a C++ vector directly instead. BUG=webrtc:5519 R=perkj@webrtc.org Review URL: https://codereview.webrtc.org/1702603002 . Cr-Commit-Position: refs/heads/master@{#11669}