[QSDetailedView] Revamp the internet details view UI (part3)

Implemented the wifi entry background.

Rewritten InternetAdapterTest as a Parameterized test that checks
whether it's in details view or not.

Bug:378514300
Flag: com.android.systemui.qs_tile_detailed_view
Test: InternetAdapterTest
Change-Id: If22a63536c6e94a5248cb9628a5109905b72ab4a