Fix wiping out a view's translationY

BUG: 25654805
Change-Id: Ib227a2cf8658e39b35f7195fbdfd9d0254d160ad
diff --git a/design/src/android/support/design/widget/ViewOffsetHelper.java b/design/src/android/support/design/widget/ViewOffsetHelper.java
index a76ca9a..1254f17 100644
--- a/design/src/android/support/design/widget/ViewOffsetHelper.java
+++ b/design/src/android/support/design/widget/ViewOffsetHelper.java
@@ -66,9 +66,9 @@
     }
 
     private static void tickleInvalidationFlag(View view) {
-        final float x = ViewCompat.getTranslationX(view);
-        ViewCompat.setTranslationY(view, x + 1);
-        ViewCompat.setTranslationY(view, x);
+        final float y = ViewCompat.getTranslationY(view);
+        ViewCompat.setTranslationY(view, y + 1);
+        ViewCompat.setTranslationY(view, y);
     }
 
     /**