Invert adapter/entry relationship

And add first example of communication back to the adapter

Test: BundleEntryAdapterTest
Test: NotificationEntryAdapterTest
Test: GroupExpansionManagerTest
Test: GroupMembershipManagerTest
Test: StatusBarNotificationPresenterTest
Bug: 395857098
Flag: com.android.systemui.notification_bundle_ui
Change-Id: I78628e98133d0f7d9d12e701e7833e87aa253ee9