Update hotseat cell height calculation.

The hotseat never has text, so we remove the icon drawable padding
from the height calculation.

This allows the items in the hotseat to be centered vertically
properly.

Bug: 63996463
Change-Id: Ie0c5706ae6edeafae321ca024c066439d40ca237
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 60c19bc..150bc53 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -365,7 +365,7 @@
         if (isVerticalBarLayout()) {
             hotseatBarSizePx = iconSizePx;
         }
-        hotseatCellHeightPx = iconSizePx + iconDrawablePaddingPx;
+        hotseatCellHeightPx = iconSizePx;
 
         if (!isVerticalBarLayout()) {
             int expectedWorkspaceHeight = availableHeightPx - hotseatBarSizePx