part of https://github.com/FlowCrypt/flowcrypt-enterprise-on-prem/issues/4097
same as FlowCrypt/flowcrypt-browser#4890 except on Android
please also respect the naming of potentialCustomUrlFes vs sharedTenantFes, both of which are instances of the same class called ExternalService / ExternalServiceXxx (instead of previously EnterpriseServer)
part of https://github.com/FlowCrypt/flowcrypt-enterprise-on-prem/issues/4097
same as FlowCrypt/flowcrypt-browser#4890 except on Android
please also respect the naming of
potentialCustomUrlFesvssharedTenantFes, both of which are instances of the same class calledExternalService/ExternalServiceXxx(instead of previouslyEnterpriseServer)