Catch a missed case when adding a toast

We allow a single toast window per UID. It is possible that
the UID had another toast window that is going away and this
CL adds a catch all check as there was a case missing.

Change-Id: I4c68e7212a05ce349e6e5b1cffe6e36d429aaca0

services/core/java/com/android/server/wm/DisplayContent.java

@@ -1121,8 +1121,7 @@ class DisplayContent extends WindowContainer<DisplayContent.DisplayChildWindowCo
         for (int i = 0; i < windowCount; i++) {
             final WindowState window = mWindows.get(i);
             if (window.mAttrs.type == TYPE_TOAST && window.mOwnerUid == uid
-                    && !window.mPermanentlyHidden && !window.mAnimatingExit
-                    && !window.mRemoveOnExit) {
+                    && !window.mPermanentlyHidden && !window.mWindowRemovalAllowed) {
                 return false;
             }
         }

services/core/java/com/android/server/wm/WindowState.java

@@ -488,7 +488,7 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
      * or some other higher level component said so (e.g. activity manager).
      * TODO: We should either have different booleans for the removal reason or use a bit-field.
      */
-    private boolean mWindowRemovalAllowed;
+    boolean mWindowRemovalAllowed;
 
     /**
      * Temp for keeping track of windows that have been removed when