private HpkeContextSender setupBaseForTesting(
        HpkeSuite suite, PublicKey publicKey, byte[] info, byte[] sKem) throws Exception {
        String algorithm = suite.name();
        HpkeContextSender sender = HpkeContextSender.getInstance(algorithm);
        sender.initForTesting(publicKey, info, sKem);
        return sender;
    }
Tests for DuckTypedHpkeSpiTest. Essentially the same as the tests for HpkeContext but
with a "foreign" HPKE Provider inserted ahead of Conscrypt. That is, one which returns
SPI instances with all the correct methods but which don't inherit directly from "our"
HpkeSpi.
common/src/test/java/org/conscrypt/DuckTypedHpkeSpiTest.java