Treat blurs as expensive rendering

It's part of revert commit Iff92fc56c43aefdb4fd978e837969f8ddc9c24f4

Bug: 399853723
Test: Manual
Flag: EXEMPT bugfix

Change-Id: I10b783469581297337f479134f6efd446f1f2106

Author: Sally Qi

services/surfaceflinger/CompositionEngine/src/Output.cpp

@@ -1389,7 +1389,8 @@ std::optional<base::unique_fd> Output::composeSurfaces(
     // or complex GPU shaders and it's expensive. We boost the GPU frequency so that
     // GPU composition can finish in time. We must reset GPU frequency afterwards,
     // because high frequency consumes extra battery.
-    const bool expensiveRenderingExpected =
+    const bool expensiveBlurs = mLayerRequestingBackgroundBlur != nullptr;
+    const bool expensiveRenderingExpected = expensiveBlurs ||
             std::any_of(clientCompositionLayers.begin(), clientCompositionLayers.end(),
                         [outputDataspace =
                                  clientCompositionDisplay.outputDataspace](const auto& layer) {