[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.cpp b/libs/hwui/renderthread/RenderProxy.cpp
index 79e46ed..4be7a57 100644
--- a/libs/hwui/renderthread/RenderProxy.cpp
+++ b/libs/hwui/renderthread/RenderProxy.cpp
@@ -270,6 +270,10 @@
     mDrawFrameTask.setContentDrawBounds(left, top, right, bottom);
 }
 
+void RenderProxy::setFrameCallback(std::function<void(int64_t)>&& callback) {
+    mDrawFrameTask.setFrameCallback(std::move(callback));
+}
+
 void RenderProxy::serializeDisplayListTree() {
     mRenderThread.queue().post([=]() { mContext->serializeDisplayListTree(); });
 }