Limit number of notification etc dots to 1

Paramterize the total space consumed by the overflow area

Changed MAX_DOTS to 1

Also changed the overflow logic in the static case so that the overflow
dots in the status bar will always show up the same distance from the
last visible icon.

Test: visual
Change-Id: I5849cbea2e4e4251c96dd40100a763ac71429c65
Fixes: 79937209