Fixed small line that may appear opening task menu with decimal position

Round the y and x values to get correct position without showing a small
line when opening the task menu.

Test: increase the display and font size to large, go to overview and
tap icon
Fixes: 110415497

Change-Id: Ia41378863fb08fc72f5cd14b40f45769ab612d22
diff --git a/quickstep/src/com/android/quickstep/views/TaskMenuView.java b/quickstep/src/com/android/quickstep/views/TaskMenuView.java
index 6eb6854..098349a 100644
--- a/quickstep/src/com/android/quickstep/views/TaskMenuView.java
+++ b/quickstep/src/com/android/quickstep/views/TaskMenuView.java
@@ -175,9 +175,9 @@
         params.width = sTempRect.width();
         params.gravity = Gravity.LEFT;
         setLayoutParams(params);
-        setX(sTempRect.left - insets.left);
-        setY(sTempRect.top + getResources().getDimension(R.dimen.task_thumbnail_top_margin)
-                - insets.top);
+        setX(Math.round(sTempRect.left - insets.left));
+        setY(Math.round(sTempRect.top - insets.top
+                + getResources().getDimension(R.dimen.task_thumbnail_top_margin)));
     }
 
     private void animateOpen() {