SurfaceFlinger: Don't render rounded corners without a valid crop

A behaviour difference introduced by I6975332392756d3d96fed1d6f81245a9c7bf0a19
This will cause layers to not render if there is a corner radius
left behind.

Test: SurfaceFlinger_test
Test: repro steps in bug
Bug: 200781179
Change-Id: Ie2548fc37bb7676c10be69130d04f93e7323e79b
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 90273e4..f559ed0 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -1939,8 +1939,9 @@
     Rect layerCropRect = getCroppedBufferSize(getDrawingState());
     const float radius = getDrawingState().cornerRadius;
     RoundedCornerState layerSettings(layerCropRect.toFloatRect(), radius);
+    const bool layerSettingsValid = layerSettings.radius > 0 && layerCropRect.isValid();
 
-    if (layerSettings.radius > 0 && parentSettings.radius > 0) {
+    if (layerSettingsValid && parentSettings.radius > 0) {
         // If the parent and the layer have rounded corner settings, use the parent settings if the
         // parent crop is entirely inside the layer crop.
         // This has limitations and cause rendering artifacts. See b/200300845 for correct fix.
@@ -1952,7 +1953,7 @@
         } else {
             return layerSettings;
         }
-    } else if (layerSettings.radius > 0) {
+    } else if (layerSettingsValid) {
         return layerSettings;
     } else if (parentSettings.radius > 0) {
         return parentSettings;