[Bug]: MetaMask SDK not working on Brave @ iOS when using HTTPS.

### SDK

Web

### Provide environment information

IOS 17.4
Brave 1.65
MetamaskSDK 0.18.6
Metamask Mobile app 7.22.0

### MetaMask SDK Version

0.18.6

### MetaMask Mobile app Version

7.22.0 (1325)

### What browser are you using? (if relevant)

Brave 1.65 (122)

### How are you deploying your application? (if relevant)

_No response_

### Describe the Bug

On Mobile, using Brave, when we access a web app that has https enabled, we try to connect but the SDK is undefined.

We see the following errors on the Brave mobile logs when the page first loads:


Raw logs:

```
[Warning] [blocked] The page at https://192.168.1.67:5173/ was not allowed to display insecure content from user-script://null/index.iife.min.js.map.

[Error] Not allowed to request resource
[Error] Cannot load user-script://null/index.iife.min.js.map due to access control checks.
[Debug] [vite] connecting... (client, line 469)
[Debug] [vite] connected. (client, line 576)
[Debug] MM_SDK [MetaMaskSDK: constructor()]: begin. +0ms (@metamask_sdk-react.js, line 19251)
[Debug] MM_SDK [MetaMaskSDK: performSDKInitialization()] options +0ms – {logging: {developerMode: true, sdk: true}, dappMetadata: {name: "Demo React App", url: "https://192.168.1.67:5173"}, communicationLayerPreference: "socket", …} (@metamask_sdk-react.js, line 19251)
{logging: {developerMode: true, sdk: true}, dappMetadata: {name: "Demo React App", url: "https://192.168.1.67:5173"}, communicationLayerPreference: "socket", enableAnalytics: true, injectProvider: true, …}Object
[Debug] MM_SDK [MetaMaskSDK: initializeMetaMaskSDK()] already initializing +1ms (@metamask_sdk-react.js, line 19251)
[Debug] MM_SDK-React [MetaMaskProviderClient] sdk already initialized +0ms (@metamask_sdk-react.js, line 42898)
[Debug] MM_SDK [WakeLockManager: setDebug()] activate debug mode +0ms (@metamask_sdk-react.js, line 19251)
[Debug] MM_SDK [RemoteConnection: initializeConnector()] initialize connector +503ms (@metamask_sdk-react.js, line 19251)
[Debug] MM_SDK [initializeMobileProvider] cachedAccountAddress: null, cachedChainId: null +23ms (@metamask_sdk-react.js, line 19251)
[Debug] MM_SDK [Ethereum: init()] Initializing Ethereum service +0ms (@metamask_sdk-react.js, line 19251)
[Debug] MM_SDK [SDKProvider: initializeStateAsync()] initialize state async started +1ms (@metamask_sdk-react.js, line 19251)
[Debug] MM_SDK [SDKProvider: constructor()] autoRequestAccounts=false +1ms (@metamask_sdk-react.js, line 19251)
[Error] TypeError: Attempted to assign to readonly property. — metamask-sdk.js:5:193994
(anonymous function) (@metamask_sdk-react.js:42638)
s3 (@metamask_sdk-react.js:16761)
[Error] [MetaMaskSDK: constructor()] error during initialization – TypeError: Attempted to assign to readonly property. — metamask-sdk.js:5:193994
TypeError: Attempted to assign to readonly property. — metamask-sdk.js:5:193994
(anonymous function) (@metamask_sdk-react.js:42621)
[Error] Unhandled Promise Rejection: TypeError: Attempted to assign to readonly property.
(anonymous function) (@metamask_sdk-react.js:22826:93)
[Error] Unhandled Promise Rejection: Error: Ethereum instance not intiialized - call Ethereum.factory first.
```

### Expected Behavior

We should be able to connect the accounts on Brave @ iOS

### Link to reproduction - Issues with a link to complete (but minimal) reproduction code will be addressed faster

https://github.com/andremfaria/mm-sdk-brave-ios-problem

### To Reproduce

- Use Safari Web Inspector to view the Brave logs on your mobile device.
- Run the example app.
- Open Brave on your iPhone and access https://:5172/.
- Hit the "Connect" button.
- Nothing happens. SDK is undefined.

Start with the linked minimal reproduction and reproduce the failure in Brave on iOS using the listed local HTTPS URL. Inspect SDK initialization in metamask-sdk.js and metamask-sdk-react.js around the reported readonly-property error. Done means the SDK initializes and the Connect action can connect accounts without the subsequent uninitialized-Ethereum error.

Written by the indexing model from the issue text.