Added OnResolutionChange to EncoderSelectorInterface.

Bug: webrtc:12406
Change-Id: I0160636d93ad0a33caf7ae7443cefe321a191406
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/258442
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36517}

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

@@ -24,6 +24,16 @@ public interface VideoEncoderFactory {
      */
     @Nullable @CalledByNative("VideoEncoderSelector") VideoCodecInfo onAvailableBitrate(int kbps);
 
+    /**
+     * Called every time the encoder input resolution change. Returns null if the encoder selector
+     * prefers to keep the current encoder or a VideoCodecInfo if a new encoder is preferred.
+     */
+    @Nullable
+    @CalledByNative("VideoEncoderSelector")
+    default VideoCodecInfo onResolutionChange(int widht, int height) {
+      return null;
+    }
+
     /**
      * Called when the currently used encoder signal itself as broken. Returns null if the encoder
      * selector prefers to keep the current encoder or a VideoCodecInfo if a new encoder is