Clear mWindowAdded when window was not added. DO NOT MERGE

If ViewRootImpl throws BadTokenException when adding a window, clear
the indication that a window has been added. That way when the
window is destroyed it doesn't try to clean it up.

Fixes bug 8409506.

Change-Id: I270740762f21ed4ec7f235344a3adaeaa033c483

core/java/android/inputmethodservice/InputMethodService.java

@@ -427,6 +427,7 @@ public class InputMethodService extends AbstractInputMethodService {
                 } catch (BadTokenException e) {
                     if (DEBUG) Log.v(TAG, "BadTokenException: IME is done.");
                     mWindowVisible = false;
+                    mWindowAdded = false;
                 }
             }
             // If user uses hard keyboard, IME button should always be shown.