Fix bug where key previews do not show up.

Bug: 6852705

Change-Id: Ib90107a5dde774b4d6c1e570629ce7f7eaff44bc
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardView.java b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
index 721931e..6269621 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
@@ -888,6 +888,7 @@
             super.onDraw(canvas);
             canvas.translate(mParams.mCoordinates[0], mParams.mCoordinates[1]);
             PointerTracker.drawGestureTrailForAllPointerTrackers(canvas, mGesturePaint);
+            canvas.translate(-mParams.mCoordinates[0], -mParams.mCoordinates[1]);
         }
     }