fix: fix asset symbol for incoming tx (#11495)

## **Description**

This PR fixes the assets symbol displayed in the incoming transaction
notification.

## **Related issues**

Fixes: #7669

## **Manual testing steps**

1. Go to this page...
2.
3.

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### **Before**

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## **Pre-merge author checklist**

- [ ] I’ve followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask Mobile
Coding
Standards](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/CODING_GUIDELINES.md).
- [ ] I've completed the PR template to the best of my ability
- [ ] I’ve included tests if applicable
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guidelines](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

## **Pre-merge reviewer checklist**

- [ ] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [ ] I confirm that this PR addresses all acceptance criteria described
in the ticket it closes and includes the necessary testing evidence such
as recordings and or screenshots.

Author: sahar-fehri

app/core/NotificationManager.js

@@ -16,8 +16,10 @@ import {
 
 import { safeToChecksumAddress } from '../util/address';
 import ReviewManager from './ReviewManager';
-import { selectChainId } from '../selectors/networkController';
+import { selectChainId, selectTicker } from '../selectors/networkController';
 import { store } from '../store';
+import { useSelector } from 'react-redux';
+import { getTicker } from '../../app/util/transactions';
 export const constructTitleAndMessage = (notification) => {
   let title, message;
   switch (notification.type) {
@@ -412,6 +414,7 @@ class NotificationManager {
     );
 
     const chainId = selectChainId(store.getState());
+    const ticker = useSelector(selectTicker);
 
     /// Find the incoming TX
     const transactions = TransactionController.getTransactions({
@@ -442,7 +445,7 @@ class NotificationManager {
             nonce: `${hexToBN(txs[0].txParams.nonce).toString()}`,
             amount: `${renderFromWei(hexToBN(txs[0].txParams.value))}`,
             id: txs[0]?.id,
-            assetType: strings('unit.eth'),
+            assetType: getTicker(ticker),
           },
           autoHide: true,
           duration: 7000,