Update overview clear all button to be larger

- Tuned the size and corner radius
- Tuned the margin from screen edge
- Tuned the vertical position

Bug: 204153113
Test: manual
Change-Id: Ibf3df599b31c7ecc2c9c951fc89e7e09c90253ef
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 0b60b32..5c16b4c 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -193,6 +193,7 @@
     public final int overviewActionsBottomMarginGesturePx;
     public int overviewPageSpacing;
     public int overviewRowSpacing;
+    public int overviewGridSideMargin;
 
     // Widgets
     public final PointF appWidgetScale = new PointF(1.0f, 1.0f);
@@ -399,6 +400,9 @@
         overviewRowSpacing = isLandscape
                 ? res.getDimensionPixelSize(R.dimen.overview_grid_row_spacing_landscape)
                 : res.getDimensionPixelSize(R.dimen.overview_grid_row_spacing_portrait);
+        overviewGridSideMargin = isLandscape
+                ? res.getDimensionPixelSize(R.dimen.overview_grid_side_margin_landscape)
+                : res.getDimensionPixelSize(R.dimen.overview_grid_side_margin_portrait);
 
         // Calculate all of the remaining variables.
         extraSpace = updateAvailableDimensions(res);