Fix extra padding when there are no static notification dots

The logic now mimics the visual overflow logic such that when the
non-static notification icon container gets a virtual end-of-layout, but
that layout has no dots, then it adds the correct amount of padding to
handle the max number of BTW notifications

Test: add 3 min priority notifications when there is one regular
notification. Pulling the shade shouldn't collapse the regular
notification icon

Bug: 73487572
Change-Id: I77cc3821f7c93a5ba88d1419fb5594ccd9e1616d