Enable RenderEngine blur testing on more devices.

Test: atest renderengine_test
Bug: 176903027
Change-Id: I85e3a561548506bd9cab1a6c8f7e15c47fbff960
diff --git a/libs/renderengine/threaded/RenderEngineThreaded.h b/libs/renderengine/threaded/RenderEngineThreaded.h
index 8b1e2de..8279cbc 100644
--- a/libs/renderengine/threaded/RenderEngineThreaded.h
+++ b/libs/renderengine/threaded/RenderEngineThreaded.h
@@ -64,6 +64,7 @@
 
     void cleanFramebufferCache() override;
     int getContextPriority() override;
+    bool supportsBackgroundBlur() override;
 
 private:
     void threadMain(CreateInstanceFactory factory);