Ensure that ghosted view is attached when calculating its matrix.

This CL ensures that the ghosted view is attached to a ViewGroup before
calculating the matrix of that view. It could happen that the view would
be detached after the animation was started, which would then crash
SysUI when calling GhostView.calculateMatrix.

I tested this CL manually by first reproducing this b/202668591 by
detaching ghostedView from its parent after the animation started, and
then confirmed that this fix prevents the animation from crashing.

Test: Manual
Bug: 202668591
Fixes: 202668591
Change-Id: I7bf0bedb4860a00f1c44cac9258ff5dc753fb355

packages/SystemUI/animation/src/com/android/systemui/animation/GhostedViewLaunchAnimatorController.kt

@@ -209,8 +209,13 @@ open class GhostedViewLaunchAnimatorController(
         val heightRatio = state.height.toFloat() / ghostedViewState.height
         val scale = min(widthRatio, heightRatio)
 
+        if (ghostedView.parent is ViewGroup) {
+            // Recalculate the matrix in case the ghosted view moved. We ensure that the ghosted
+            // view is still attached to a ViewGroup, otherwise calculateMatrix will throw.
+            GhostView.calculateMatrix(ghostedView, launchContainer, ghostViewMatrix)
+        }
+
         launchContainer.getLocationOnScreen(launchContainerLocation)
-        GhostView.calculateMatrix(ghostedView, launchContainer, ghostViewMatrix)
         ghostViewMatrix.postScale(
             scale, scale,
             ghostedViewState.centerX - launchContainerLocation[0],