Rename debug property and expose it in HardwareRenderer

Change-Id: If46a9bc14a50f6c9a202d901881b36bbac32cba3
diff --git a/core/java/android/view/HardwareRenderer.java b/core/java/android/view/HardwareRenderer.java
index 7929112..e086f5a 100644
--- a/core/java/android/view/HardwareRenderer.java
+++ b/core/java/android/view/HardwareRenderer.java
@@ -173,6 +173,19 @@
     public static final String DEBUG_SHOW_OVERDRAW_PROPERTY = "debug.hwui.show_overdraw";
 
     /**
+     * Turn on to debug non-rectangular clip operations.
+     *
+     * Possible values:
+     * "hide", to disable this debug mode
+     * "highlight", highlight drawing commands tested against a non-rectangular clip
+     * "stencil", renders the clip region on screen when set
+     *
+     * @hide
+     */
+    public static final String DEBUG_SHOW_NON_RECTANGULAR_CLIP_PROPERTY =
+            "debug.hwui.show_non_rect_clip";
+
+    /**
      * A process can set this flag to false to prevent the use of hardware
      * rendering.
      *