Export isTokenDetectionSupportedForNetwork function (#1034)

The function `isTokenDetectionSupportedForNetwork` is now exported from
the `assets-controllets` package. This function was exported from the
`utils` before this repository was split into separate packages. This
function is used in `metamask-mobile`.

- CHANGED:

- [assets-controllers]: Export the function
`isTokenDetectionSupportedForNetwork`

**Checklist**

- [x] Tests are included if applicable
- [x] Any added code is fully documented

packages/assets-controllers/src/index.ts

@@ -8,4 +8,8 @@ export * from './TokenDetectionController';
 export * from './TokenListController';
 export * from './TokenRatesController';
 export * from './TokensController';
-export { formatIconUrlWithProxy, getFormattedIpfsUrl } from './assetsUtil';
+export {
+  isTokenDetectionSupportedForNetwork,
+  formatIconUrlWithProxy,
+  getFormattedIpfsUrl,
+} from './assetsUtil';