Tokens list disable external calls when ThirdParty services are disabled

[Khushboo-dev-cpp]

Description

After discussion with Sale opening this task, in case Sales New Tokens list is not yet ready, we may have ti include this change to block externals calls in the new token manager for the Privacy mode release

[saledjenic]

Reference to the PR that is bringing a big fundamental change #18965

[Khushboo-dev-cpp]

will be done by status-im/status-go#7001