Fix launcher KCA updates when entering -1 screen

Fix an issue where launcher incorrectly sets KCA as visible when
entering the -1 screen. This adds a check for whether we are on the
-1 screen.

Note that there is still a another callback that happens when
interacting or exiting the -1 screen, could be worth investigating
further.

Flag: EXEMPT bugfix
Test: enter -1 screen > verify pip moves down and KCA visible=false
Test: exit -1 screen > verify pip moves up and KCA visible=true
Bug: b/354080363
Change-Id: I1b8c05af21eca5a2accc8e94ab016f6c50c74c7c