Fix Taskabr Divider Line traveling too far

Currently, all apps button and divider line overlaps each other when launching app from home. so here we are arbituraly making tasakbar divider line position in hotseat to be little off centered so icons don't over lap and divider line travels less to its position on taskbar.

Test: Manual
Bug: 308488785
Flag: LEGACY ENABLE_TASKBAR_PINNING DISABLED
Change-Id: I6cf9f3db50f34deb0c393ec1cfd0268e1b147758