Revert of Ignore Camera and Flip bits in CVO when parsing video rotation (patchset #3 id:80001 of https://codereview.webrtc.org/2280703002/ )

Reason for revert:
Breaks downstream build.

Original issue's description:
> Ignore Camera and Flip bits in CVO when parsing video rotation
>
> Currently, if WebRTC receives a CVO byte where the Camera or Flip bit is
> set, then rotation is incorrectly parsed as 0. This CL fixes that issue.
> The Camera and Flip bit is still unimplemented and will just be ignored
> though.
>
> BUG=webrtc:6120
> R=danilchap@webrtc.org, pthatcher@webrtc.org, tommi@webrtc.org
>
> Committed: f9e1b922ef

TBR=pthatcher@webrtc.org,danilchap@webrtc.org,tommi@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6120

Review-Url: https://codereview.webrtc.org/2300323002
Cr-Commit-Position: refs/heads/master@{#14035}

webrtc/modules/rtp_rtcp/source/rtp_header_extensions.cc

@@ -177,7 +177,7 @@ bool VideoOrientation::IsSupportedFor(MediaType type) {
 }
 
 bool VideoOrientation::Parse(const uint8_t* data, VideoRotation* rotation) {
-  *rotation = ConvertCVOByteToVideoRotation(data[0]);
+  *rotation = ConvertCVOByteToVideoRotation(data[0] & 0x03);
   return true;
 }