[Cashtab] Update incoming txs with direct calls to antd

Summary: Update the incoming XEC and eToken tx notifs to call antd from callsite instead of from Notification.js.

Test Plan:

• Receive an XEC tx
• Receive an eToken that has an existing balance on wallet
• Receive an eToken that has no existing balance on wallet

Reviewers: #bitcoin_abc, bytesofman

Reviewed By: #bitcoin_abc, bytesofman

Differential Revision: https://reviews.bitcoinabc.org/D15476