SF: Set up librenderengine_mocks

Move the existing mocks out of the unit test directory into
RenderEngine/include/renderengine/mock and RenderEngine/mock.

This allows other unit tests to easily reuse the mocks.

Change the unit test to use the new library and reference the moved
headers.

Test: atest libsurfaceflinger_unittest libcompositionengine_test
Bug: 121291683
Change-Id: I1577995e6140cb3949207c5bc746c46b7828ae19
diff --git a/services/surfaceflinger/tests/unittests/CompositionTest.cpp b/services/surfaceflinger/tests/unittests/CompositionTest.cpp
index f9c6881..e417350 100644
--- a/services/surfaceflinger/tests/unittests/CompositionTest.cpp
+++ b/services/surfaceflinger/tests/unittests/CompositionTest.cpp
@@ -21,6 +21,9 @@
 #include <gtest/gtest.h>
 #include <gui/IProducerListener.h>
 #include <log/log.h>
+#include <renderengine/mock/Framebuffer.h>
+#include <renderengine/mock/Image.h>
+#include <renderengine/mock/RenderEngine.h>
 #include <system/window.h>
 #include <utils/String8.h>
 
@@ -35,7 +38,6 @@
 #include "mock/MockEventControlThread.h"
 #include "mock/MockEventThread.h"
 #include "mock/MockMessageQueue.h"
-#include "mock/RenderEngine/MockRenderEngine.h"
 #include "mock/system/window/MockNativeWindow.h"
 
 namespace android {