Remove unnecessary release call in EglRenderer.

VideoSink is not assumed to take ownership of the frame, so it is not
necessary to release it unless it is retained for future use.

BUG=webrtc:7749

Review-Url: https://codereview.webrtc.org/3003563002
Cr-Commit-Position: refs/heads/master@{#19440}

webrtc/sdk/android/api/org/webrtc/EglRenderer.java

@@ -430,7 +430,6 @@ public class EglRenderer implements VideoRenderer.Callbacks, VideoSink {
     synchronized (handlerLock) {
       if (renderThreadHandler == null) {
         logD("Dropping frame - Not initialized or already released.");
-        frame.release();
         return;
       }
       synchronized (frameLock) {