SF: Introduce mock::NativeWindowSurface

Test: Builds
Bug: 74827900
Change-Id: I325521b736b14077d44b24c458ee1ad995273569
(cherry picked from commit b0325674c80439a8c434f4514ddf7268d45dbc87)
diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index 36bc80f..8ffc5ad 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -28,6 +28,7 @@
         "MockGraphicBufferProducer.cpp",
         "MockMessageQueue.cpp",
         "MockNativeWindow.cpp",
+        "MockNativeWindowSurface.cpp",
         "MockRenderEngine.cpp",
         "MockSurfaceInterceptor.cpp",
     ],