Make WindowInsets#hasInsets check for stable insets as well

Bug 20091509

Change-Id: Ia7dda5ab94a0904277c1078f3f73a59a735860d8
diff --git a/core/java/android/view/WindowInsets.java b/core/java/android/view/WindowInsets.java
index 9e0719d..997e7e8 100644
--- a/core/java/android/view/WindowInsets.java
+++ b/core/java/android/view/WindowInsets.java
@@ -251,7 +251,7 @@
      * @return true if any inset values are nonzero
      */
     public boolean hasInsets() {
-        return hasSystemWindowInsets() || hasWindowDecorInsets();
+        return hasSystemWindowInsets() || hasWindowDecorInsets() || hasStableInsets();
     }
 
     /**