Reason for revert: Breaks downstream import. Original issue's description: > Android: Make base interface for camera1 and camera2 > > This CL adds a new interface CameraVideoCapturer that extends VideoCapturer with a switchCamera() function. It also moves moves CameraEventsHandler, CameraStatistics, and CameraSwitchHandler from VideoCapturerAndroid to this new interface. The purpose is to prepare for a camera2 implementation that will use the same interfaces and helper class. > > BUG=webrtc:5519 > > Committed: https://crrev.com/6bdacaddfb18edef1f0cdd778209f6b05a8f9210 > Cr-Commit-Position: refs/heads/master@{#12723} TBR=perkj@webrtc.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=webrtc:5519 Review-Url: https://codereview.webrtc.org/1979583002 Cr-Commit-Position: refs/heads/master@{#12727}