Fix padding in global actions list item

Re-align the icon edges with the expected amount of padding in the
long-press power dialog.

Change-Id: I0d2f86447e635d5c339b07c261716e12670dc06d

Author: adamp

core/res/res/layout/global_actions_item.xml

@@ -22,15 +22,15 @@
     android:minHeight="?android:attr/listPreferredItemHeight"
     android:orientation="horizontal"
 
-    android:paddingStart="16dip"
+    android:paddingStart="8dip"
     android:paddingTop="6dip"
     android:paddingBottom="6dip"
     >
     <ImageView android:id="@+id/icon"
         android:layout_width="56dp"
         android:layout_height="56dp"
         android:layout_gravity="center"
-        android:layout_marginEnd="16dip"
+        android:layout_marginEnd="8dip"
         android:scaleType="center"/>
 
     <LinearLayout