chore: Update BNB logos (#10412)

## **Description**

Updates BNB logos to updated png assets

## **Related issues**

Fixes: MMASSETS-221

## **Manual testing steps**

Run app in light and dark mode and validate that all BNB network icons
are updated. Note that erc20 token assets may not be correctly reflected
until MetaMask/contract-metadata#1334 is merged.

## **Screenshots/Recordings**

<!-- If applicable, add screenshots and/or recordings to visualize the
before and after of your change. -->

### **Before**

<img width="350" alt="Screenshot 2024-07-25 at 9 32 20 AM"
src="https://github.com/user-attachments/assets/58ffab8c-2816-4abc-93ec-8574de029d68">

<img width="350" alt="Screenshot 2024-07-25 at 9 32 35 AM"
src="https://github.com/user-attachments/assets/59b37e4f-3b10-498b-9883-84dc7c674708">

<img width="352" alt="Screenshot 2024-07-25 at 9 37 57 AM"
src="https://github.com/user-attachments/assets/1bbd4b08-5e78-45a3-9088-5e0925920995">

<img width="352" alt="Screenshot 2024-07-25 at 9 38 18 AM"
src="https://github.com/user-attachments/assets/3cbffb89-558b-43b2-b5e6-d74965022250">

### **After**

<img width="349" alt="Screenshot 2024-07-25 at 9 50 25 AM"
src="https://github.com/user-attachments/assets/74084ef9-93e9-43a0-8b2c-3df23ba94f6c">

<img width="350" alt="Screenshot 2024-07-25 at 9 50 43 AM"
src="https://github.com/user-attachments/assets/04956cb2-7484-467a-aa43-b5fe962df112">

<img width="352" alt="Screenshot 2024-07-25 at 9 49 41 AM"
src="https://github.com/user-attachments/assets/60b62430-7d51-4e51-89bb-1b143366a44a">

<img width="351" alt="Screenshot 2024-07-25 at 9 49 53 AM"
src="https://github.com/user-attachments/assets/381dde1d-4aae-48a7-957d-34738f91e0cf">

## **Pre-merge author checklist**

- [x] 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).
- [x] I've completed the PR template to the best of my ability
- [x] I’ve included tests if applicable
- [x] I’ve documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [x] I’ve applied the right labels on the PR (see [labeling
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.