Remove redundant interface from FinalMatrixTPWrapper.

PiperOrigin-RevId: 463646211
(cherry picked from commit b28fb139)

libraries/transformer/src/main/java/androidx/media3/transformer/FinalMatrixTransformationProcessorWrapper.java

@@ -54,7 +54,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
  * GlTextureProcessor} instances used by {@link FrameProcessor}.
  */
 /* package */ final class FinalMatrixTransformationProcessorWrapper
-    implements GlTextureProcessor, ExternalTextureProcessor {
+    implements ExternalTextureProcessor {
 
   private static final String TAG = "FinalProcessorWrapper";