Update wallet suggestions controller to no longer use a broadcast for

suggestions

The service added in http://ag/22168927 will listen for updates from PCC
and give those to the controller

Bug: b/237409756
Test: atest com.android.systemui.wallet.controller.WalletContextualSuggestionsControllerTest
Test: Manually verified this works with child change http://ag/22207162
Change-Id: I750a1461750c7a63d2f67e474804d25cd7d9a7dd