Add expansion animation to QSFragmentCompose

This uses an STL with a single transition between QQS and QS, and
progress set between 0 and 1.

This only tracks the expansion value passed from NPVC and not the other
values (like translation or squishiness). Those will be added in a
followup CL.

Test: atest QSFragmentComposeViewModelTest
Test: atest PlatformScenarioTests
Flag: com.android.systemui.qs_ui_refactor_compose_fragment
Bug: 353254353

Change-Id: I7f86affab32d54f0c15e11a108e0f72e1383fe89