Add Volume Panel tests

Bug: 318080198
Flag: aconfig new_volume_panel DISABLED
Test: atest BottombarViewModelTest
Test: atest ComponentsInteractorImplTest
Test: atest ComponentsFactoryTest
Test: atest VolumePanelViewModelTest
Test: atest DefaultComponentsLayoutManagerTest
Change-Id: I7929a8e8923bd9e1ae7bdc1d6b131a69b4a69c26
10 files changed