am 239a0c0e: Ensure ViewRootImpl.setAccessibilityFocus() doesn\'t crash when reentrant.

* commit '239a0c0e6a6fc36025fdb1c662e1c7acaec144bb':
  Ensure ViewRootImpl.setAccessibilityFocus() doesn't crash when reentrant.

core/java/android/view/ViewRootImpl.java

@@ -2709,7 +2709,6 @@ public final class ViewRootImpl implements ViewParent,
 
             AccessibilityNodeInfo focusNode = mAccessibilityFocusedVirtualView;
             View focusHost = mAccessibilityFocusedHost;
-            focusHost.clearAccessibilityFocusNoCallbacks();
 
             // Wipe the state of the current accessibility focus since
             // the call into the provider to clear accessibility focus
@@ -2719,6 +2718,10 @@ public final class ViewRootImpl implements ViewParent,
             mAccessibilityFocusedHost = null;
             mAccessibilityFocusedVirtualView = null;
 
+            // Clear accessibility focus on the host after clearing state since
+            // this method may be reentrant.
+            focusHost.clearAccessibilityFocusNoCallbacks();
+
             AccessibilityNodeProvider provider = focusHost.getAccessibilityNodeProvider();
             if (provider != null) {
                 // Invalidate the area of the cleared accessibility focus.