Take fixed rotation into account when setting the rounded corner frame

This CL uses the FixedRotationTransformDisplayBounds as the rounded
corner frame while the token is in fixed-rotation.

Fix: 346772491
Flag: NA
Test: run WindowPolicyTests#testWindowInsets during fixed-rotation
Change-Id: I356de4483e2e9b95e410cf7144d70c36f02443ca

services/core/java/com/android/server/wm/InsetsPolicy.java

@@ -424,7 +424,9 @@ private InsetsState adjustInsetsForRoundedCorners(WindowToken token, InsetsState
                 // Use task bounds to calculating rounded corners if the task is not floating.
                 final InsetsState state = copyState ? new InsetsState(originalState)
                         : originalState;
-                state.setRoundedCornerFrame(task.getBounds());
+                state.setRoundedCornerFrame(token.isFixedRotationTransforming()
+                        ? token.getFixedRotationTransformDisplayBounds()
+                        : task.getBounds());
                 return state;
             }
         }