Revert^2 "Add View.viewModel utility"

This allows for finer-grained structured concurrency for view-models
within a view-binder.

This reverts commit 51109621.

Reason for revert: Crash fixed by I5501b4878e7fe30f6a6d19b08b327ace009ad9c7

Flag: com.android.systemui.scene_container
Bug: 354269846
Test: atest SysUiViewModelTest
Change-Id: Ieef319268d0a3ea9fb61c135ac11fdcb4236b4c8