Polish Wallet empty state view.

Another change is a bug fix that do not use the cached "mWalletEnabled"
on cards querying, because that param is for the wallet preference only.
We use "cardsRetriever"s to handle querying cards on wallet
feature/service not available.
Also register the wallet service event listener to WalletActivity, this
enables the wallet activity finish after the user makes an NFC payment
tap.

Fixes: 189869634
Fixes: 187970986
Fixes: 188972317
Test: manual- see demo:
https: //drive.google.com/file/d/1I-vwffhRqR2HDHR8wQqitOqzH0tWjMEI/view?usp=sharing&resourcekey=0-3BZsJl_c7jzW7muwNG9hmA
Change-Id: If907cb5d6c89878d2a5a6a282284e3bf77f7188f