Incorrect temporary detach of accessibility focused view may lead to a crash.

1. If an app naither reattaches nor removes detached view that has
   accessibility focus, an exception in the drawing of accessibility
   focus occurs since we are trying to compute the focused rect by
   offseting the bounds of the focused view in coords of the root
   but the focused one is not attached.

bug:7297191

Change-Id: Ib69d52e474b8ea365754f5311f5e809bd757dd1a

Author: sganov

core/java/android/view/ViewGroup.java

@@ -3912,7 +3912,6 @@ protected void attachViewToParent(View child, int index, LayoutParams params) {
      * @see #removeDetachedView(View, boolean)
      */
     protected void detachViewFromParent(View child) {
-        child.clearAccessibilityFocus();
         removeFromArray(indexOfChild(child));
     }
 
@@ -3934,7 +3933,6 @@ protected void detachViewFromParent(View child) {
      * @see #removeDetachedView(View, boolean)
      */
     protected void detachViewFromParent(int index) {
-        getChildAt(index).clearAccessibilityFocus();
         removeFromArray(index);
     }
 

core/java/android/view/ViewRootImpl.java

@@ -2322,7 +2322,13 @@ private void drawAccessibilityFocusedDrawableIfNeeded(Canvas canvas) {
             mAccessibilityFocusedHost.getDrawingRect(bounds);
             if (mView instanceof ViewGroup) {
                 ViewGroup viewGroup = (ViewGroup) mView;
-                viewGroup.offsetDescendantRectToMyCoords(mAccessibilityFocusedHost, bounds);
+                try {
+                    viewGroup.offsetDescendantRectToMyCoords(mAccessibilityFocusedHost, bounds);
+                } catch (IllegalArgumentException iae) {
+                    Log.e(TAG, "Temporary detached view that was neither removed not reattached: "
+                            + mAccessibilityFocusedHost);
+                    return;
+                }
             }
         } else {
             if (mAccessibilityFocusedVirtualView == null) {