[QSDetailedView] Revamp the internet details view UI (part4)

- Set the background for mobile entries.
- Set the OnClickListener for the corresponding mobile views.
- Remove the paddings between the share wifi button and wifilist view.

Bug:378514300
Flag: com.android.systemui.qs_tile_detailed_view
Test: InternetDetailsContentManagerTest
Change-Id: I0294f5c7aff5a088a73b3142ee2aa4685c330c17