Remove usage of qs_new_pipeline flag

This removes all the usages, as well as classes that are not needed
anymore in the new pipeline.

Bug: 357647489
Flag: EXEMPT flag cleanup
Test: atest com.android.systemui.qs
Test: atest PlatformScenarioTests
Test: atest CtsTileServiceTestCases
Change-Id: Ice6ab30836440e0bac0b12ce8e488120b3bc178d
17 files changed