Fix gravity of QQS tile layout

The margins are set for the view on both sides as needed, so remove the
forced horizontal gravity.

This fixes a bug where the layout was not in the correct horizontal
position on landscape with media.

Bug: 181673785
Test: manual
Change-Id: I5977a4dd595e640d9cf28678619d292f5d203ebc

packages/SystemUI/src/com/android/systemui/qs/QuickQSPanel.java

@@ -349,7 +349,6 @@ public class QuickQSPanel extends QSPanel {
             setClipToPadding(false);
             LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT,
                     LayoutParams.WRAP_CONTENT);
-            lp.gravity = Gravity.CENTER_HORIZONTAL;
             setLayoutParams(lp);
             setMaxColumns(4);
         }