[Shadows] Add shadow radius to sf layer state (2/n)

Bug: 136561771
Test: atest SurfaceFlinger_Test
Change-Id: Icafe852eaad195163b48b802db2a4b092aa30926
diff --git a/services/surfaceflinger/ContainerLayer.h b/services/surfaceflinger/ContainerLayer.h
index b48d471..9b7bab1 100644
--- a/services/surfaceflinger/ContainerLayer.h
+++ b/services/surfaceflinger/ContainerLayer.h
@@ -34,6 +34,7 @@
     bool isCreatedFromMainThread() const override { return true; }
 
 protected:
+    bool canDrawShadows() const override { return false; }
     sp<Layer> createClone() override;
 };