Avoid showing popup when View detatched.

Bug: 6388558
Change-Id: I12cfde91b142916ce137ebd4e96107a12ad2b4b7

Author: jsharkey

packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java

@@ -237,6 +237,7 @@ protected View.OnLongClickListener getNotificationLongClicker() {
             public boolean onLongClick(View v) {
                 final String packageNameF = (String) v.getTag();
                 if (packageNameF == null) return false;
+                if (v.getWindowToken() == null) return false;
                 PopupMenu popup = new PopupMenu(mContext, v);
                 popup.getMenuInflater().inflate(R.menu.notification_popup_menu, popup.getMenu());
                 popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {