[Magnifier-26] Wire up frame callback for realsies

Test: none yet
Bug: 73810478
Bug: 72041926
Change-Id: I7154ed4b3d2cd820dc8c8ff55eed130be87d1606
diff --git a/libs/hwui/renderthread/RenderProxy.h b/libs/hwui/renderthread/RenderProxy.h
index bc57d92..3425c5c 100644
--- a/libs/hwui/renderthread/RenderProxy.h
+++ b/libs/hwui/renderthread/RenderProxy.h
@@ -115,6 +115,7 @@
     ANDROID_API void removeRenderNode(RenderNode* node);
     ANDROID_API void drawRenderNode(RenderNode* node);
     ANDROID_API void setContentDrawBounds(int left, int top, int right, int bottom);
+    ANDROID_API void setFrameCallback(std::function<void(int64_t)>&& callback);
 
     ANDROID_API void addFrameMetricsObserver(FrameMetricsObserver* observer);
     ANDROID_API void removeFrameMetricsObserver(FrameMetricsObserver* observer);