fix: use hostname to fetch approvedhosts (#7489)

## **Description**
This PR fixes an Android SDK bug whereby:
- The wallet was always returning the first permitted account instead of
the selected account when connecting the SDK to MetaMask
- Changing the selected account on MetaMask did not fire a
`metamask_accountsChanged` event so the SDK did not get selected account
updated.

This change implements the `getApprovedHosts` to fix this issue. 

## **Manual testing steps**

_1. Have more than one address in your metamask account and select any
address as active address
_2. Connect from Android Metamask SDK and ensure the active account is
the selected address on the SDK
_3. Switch to another account on the wallet, and ensure that the SDK
updates to the new address

## **Related issues**

_Fixes #???_

## **Pre-merge author checklist**

- [ ] I’ve followed [MetaMask Coding
Standards](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/CODING_GUIDELINES.md).
- [x] I've clearly explained:
  - [x] What problem this PR is solving.
  - [x] How this problem was solved.
  - [x] How reviewers can test my changes.
- [ ] I’ve indicated what issue this PR is linked to: Fixes #???
- [ ] I’ve included tests if applicable.
- [x] I’ve documented any added code.
- [ ] 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)).
- [x] I’ve properly set the pull request status:
  - [ ] In case it's not yet "ready for review", I've set it to "draft".
- [ ] In case it's "ready for review", I've changed it from "draft" to
"non-draft".

## **Pre-merge reviewer checklist**

- [x] 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.

app/core/BackgroundBridge/BackgroundBridge.js

@@ -195,7 +195,12 @@ export class BackgroundBridge extends EventEmitter {
 
   notifySelectedAddressChanged(selectedAddress) {
     if (this.isRemoteConn) {
-      if (!this.getApprovedHosts?.()?.[this.remoteConnHost]) return;
+      // Pass the remoteConnHost to getApprovedHosts as AndroidSDK requires it
+      if (
+        !this.getApprovedHosts?.(this.remoteConnHost)?.[this.remoteConnHost]
+      ) {
+        return;
+      }
     }
     this.sendNotification({
       method: NOTIFICATION_NAMES.accountsChanged,

app/core/RPCMethods/RPCMethodMiddleware.ts

@@ -244,7 +244,8 @@ export const getRpcMethodMiddleware = ({
     const getAccounts = (): string[] => {
       const selectedAddress =
         Engine.context.PreferencesController.state.selectedAddress?.toLowerCase();
-      const isEnabled = isWalletConnect || getApprovedHosts()[hostname];
+      const approvedHosts = getApprovedHosts(hostname) || {};
+      const isEnabled = isWalletConnect || approvedHosts[hostname];
       return isEnabled && selectedAddress ? [selectedAddress] : [];
     };
 
@@ -907,5 +908,4 @@ export const getRpcMethodMiddleware = ({
     }
     await rpcMethods[req.method]();
   });
-
 export default getRpcMethodMiddleware;

app/core/SDKConnect/AndroidSDK/AndroidService.ts

@@ -125,11 +125,11 @@ export default class AndroidService extends EventEmitter2 {
 
         try {
           if (!this.connectedClients?.[clientInfo.clientId]) {
-            await this.requestApproval(clientInfo);
             this.setupBridge(clientInfo);
             // Save session to SDKConnect
             SDKConnect.getInstance().addAndroidConnection({
               id: clientInfo.clientId,
+              lastAuthorized: Date.now(),
               origin: AppConstants.MM_SDK.ANDROID_SDK,
               originatorInfo: clientInfo.originatorInfo,
               otherPublicKey: '',
@@ -331,11 +331,13 @@ export default class AndroidService extends EventEmitter2 {
 
     const bridge = new BackgroundBridge({
       webview: null,
-      isMMSDK: false,
+      isMMSDK: true,
       url: PROTOCOLS.METAMASK + '://' + AppConstants.MM_SDK.SDK_REMOTE_ORIGIN,
       isRemoteConn: true,
       sendMessage: this.sendMessage.bind(this),
-      getApprovedHosts: () => false,
+      getApprovedHosts: (host: string) => ({
+        [host]: true,
+      }),
       remoteConnHost:
         clientInfo.originatorInfo.url ?? clientInfo.originatorInfo.title,
       getRpcMethodMiddleware: ({
@@ -348,10 +350,12 @@ export default class AndroidService extends EventEmitter2 {
           hostname:
             clientInfo.originatorInfo.url ?? clientInfo.originatorInfo.title,
           getProviderState,
-          isMMSDK: false,
+          isMMSDK: true,
           navigation: null, //props.navigation,
-          getApprovedHosts: () => ({}),
-          setApprovedHosts: () => ({}),
+          getApprovedHosts: (host: string) => ({
+            [host]: true,
+          }),
+          setApprovedHosts: () => true,
           approveHost: () => ({}),
           // Website info
           url: {