mts: Add onInputBufferDone to CodecListener

Test: Builds
Bug: 112598772

Change-Id: I06db4673aaba9dc95561dcc529788d168019df0f
diff --git a/codec2/hidl/1.0/mts/common/media_c2_hidl_test_common.h b/codec2/hidl/1.0/mts/common/media_c2_hidl_test_common.h
index cadbe4a..89e4abd 100644
--- a/codec2/hidl/1.0/mts/common/media_c2_hidl_test_common.h
+++ b/codec2/hidl/1.0/mts/common/media_c2_hidl_test_common.h
@@ -81,6 +81,12 @@
         (void)comp;
     }
 
+    virtual void onInputBufferDone(
+        const std::shared_ptr<C2Buffer>& buffer) override {
+        /* TODO */
+        (void)buffer;
+    }
+
     virtual void onFramesRendered(
         const std::vector<RenderedFrame>& renderedFrames) override {
         /* TODO */