Revert of Remove deprected functions from EncodedImageCallback and RtpRtcp (patchset #4 id:100001 of https://codereview.webrtc.org/2405173006/ )

Reason for revert:
Still breaks internal downstream project.
Sergey: Please update internal project before relanding this.

Original issue's description:
> Remove deprected functions from EncodedImageCallback and RtpRtcp
>
> Removed EncodedImageCallback::Encoded() and RtpRtcp::SendOutgoingData().
> These methods should no longer be used anywhere and it's safe to remove
> them.
>
> BUG=chromium:621691
>
> Committed: https://crrev.com/c681250aaa2025836db7669694e323898e5c2ca7
> Cr-Commit-Position: refs/heads/master@{#14923}

TBR=mflodman@webrtc.org,stefan@webrtc.org,sergeyu@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:621691

Review-Url: https://codereview.webrtc.org/2479643002
Cr-Commit-Position: refs/heads/master@{#14925}

webrtc/modules/video_coding/video_receiver.cc

@@ -270,8 +270,8 @@ int32_t VideoReceiver::Decode(uint16_t maxWaitTimeMs) {
     if (qp_parser_.GetQp(*frame, &qp)) {
       encoded_image.qp_ = qp;
     }
-    pre_decode_image_callback_->OnEncodedImage(encoded_image,
-                                               frame->CodecSpecific(), nullptr);
+    pre_decode_image_callback_->Encoded(encoded_image, frame->CodecSpecific(),
+                                        nullptr);
   }
 
   rtc::CritScope cs(&receive_crit_);