Increase default user icon size.

This increases the size of the default user icon to the size specified
by the system (190dp), using the new method added in ag/16847427.

Bug: 218838295
Test: visual inspection
Test: make RunSettingsRoboTests -j40 ROBOTEST_FILTER="com.android.settings.users.UserSettingsTest"
Change-Id: I3d88fbd1e148f0f63c796a272cd5771f4447812d

src/com/android/settings/dashboard/profileselector/UserAdapter.java

@@ -78,7 +78,7 @@ public class UserAdapter implements SpinnerAdapter, ListAdapter {
         }
 
         private static Drawable encircle(Context context, Drawable icon) {
-            return new UserIconDrawable(UserIconDrawable.getSizeForList(context))
+            return new UserIconDrawable(UserIconDrawable.getDefaultSize(context))
                     .setIconDrawable(icon).bake();
         }
     }