Update tests to work with NICRefactor enabled

We explicitly disable the flag for some tests; they are testing legacy
behaviors and will be removed when the flag is released.

Flag: ACONFIG com.android.systemui.notifications_icon_container_refactor DEVELOPMENT
Test: atest SystemUITests
Bug: 278765923
Change-Id: Id33828107dac6eeffcfff05807c72d646a79aa92