Prevent calls into IStatusBarService if they come from visible background users

In Multi Display configuration with Concurrent Multi Users, calls into
IStatusBar from background users are not currently supported.

Bug: 384668668
Bug: 332222893
Flag: EXEMPT bug fix
Test: Tested on sdk_car_md emulator
Test: atest --user-type secondary_user_on_secondary_display android.server.wm.insets.WindowInsetsControllerTests
Change-Id: I39512a3e386531ce1429d4ac47c335ba3701ef64