For the sdkmanager use the following extra options:
sdkmanager --list --verbose --no_https --proxy=http --proxy_host=<proxy_host> --proxy_port=<proxy_port>
For the sdkmanager use the following extra options:
sdkmanager --list --verbose --no_https --proxy=http --proxy_host=<proxy_host> --proxy_port=<proxy_port>