Do not apply transforms when using drawColor().

This fixes an issue in the way the clip transformations were applied.

Change-Id: I91e7b5d15baf244d1280e48938282bb33609081d
diff --git a/libs/hwui/Snapshot.h b/libs/hwui/Snapshot.h
index ef9269f..7265d91 100644
--- a/libs/hwui/Snapshot.h
+++ b/libs/hwui/Snapshot.h
@@ -56,6 +56,8 @@
             previous(s),
             layer(NULL),
             fbo(s->fbo) {
+        mappedClip.set(s->clipRect);
+        transform.mapRect(mappedClip);
     }
 
     /**
@@ -87,12 +89,20 @@
      * Returns the current clip region mapped by the current transform.
      */
     const Rect& getMappedClip() {
+        return mappedClip;
+    }
+
+    /**
+     * Intersects the current clip with the new clip rectangle.
+     */
+    bool clip(float left, float top, float right, float bottom) {
+        bool clipped = clipRect.intersect(left, top, right, bottom);
         if (flags & kFlagDirtyTransform) {
             flags &= ~kFlagDirtyTransform;
             mappedClip.set(clipRect);
             transform.mapRect(mappedClip);
         }
-        return mappedClip;
+        return clipped;
     }
 
     /**