SF: Fix blur region transform regression

Fixes a regression caused by ag/19611172
(bedb44bb15cd11689b96770a45eccf475778e9eb) where we used
the local to screen space transform inv instead of local transform inv
for blur.

Test: atest BlurTests
Bug: 248609209
Change-Id: I06a97ca32c7689a252029a319a9519d2bffdbd25
diff --git a/services/surfaceflinger/LayerFE.h b/services/surfaceflinger/LayerFE.h
index e4f6889..822bcb7 100644
--- a/services/surfaceflinger/LayerFE.h
+++ b/services/surfaceflinger/LayerFE.h
@@ -57,6 +57,7 @@
     gui::LayerMetadata relativeLayerMetadata;
     bool contentDirty;
     bool hasReadyFrame;
+    ui::Transform blurRegionTransform;
 };
 
 struct CompositionResult {