Release codec config buffer

Bug: webrtc:369739207
Change-Id: Id103d26595acf59c8295d10777cd10095178df72
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/376102
Reviewed-by: Zoé Lepaul <xalep@webrtc.org>
Auto-Submit: Sergey Silkin <ssilkin@webrtc.org>
Commit-Queue: Zoé Lepaul <xalep@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#43871}

sdk/android/src/java/org/webrtc/HardwareVideoEncoder.java

@@ -600,6 +600,7 @@ class HardwareVideoEncoder implements VideoEncoder {
           configBuffer = ByteBuffer.allocateDirect(info.size);
           configBuffer.put(outputBuffer);
         }
+        codec.releaseOutputBuffer(index, /* render= */ false);
         return;
       }