The keystore `adservices_test_server.p12` has been generated with the following commands and using
the password `adservices_test`.
The cert file `adservices_test_server.crt` is then copied under `res/raw` to make the app to
trust the server.


```shell
$ openssl req -new -x509 -nodes -sha1 -days 3650 \
    -subj "/CN=AdServicesTests" \
    -addext "subjectAltName=DNS:localhost,IP:127.0.0.1" \
    -out /tmp/adservices_test_server.crt \
    -keyout /tmp/adservices_test_server.key
$ openssl pkcs12 -export -clcerts \
    -in /tmp/adservices_test_server.crt \
    -inkey /tmp/adservices_test_server.key \
    -out adservices_test_server.p12
```