Add IsResumption method to QUIC client handshakers

gfe-relnote: no behavior change: adding unused method
PiperOrigin-RevId: 279141655
Change-Id: Icfe08baf904b37a702c73c071334b11bb6cf2234
diff --git a/quic/core/quic_crypto_client_stream_test.cc b/quic/core/quic_crypto_client_stream_test.cc
index 8e1ef25..2622439 100644
--- a/quic/core/quic_crypto_client_stream_test.cc
+++ b/quic/core/quic_crypto_client_stream_test.cc
@@ -93,6 +93,7 @@
   CompleteCryptoHandshake();
   EXPECT_TRUE(stream()->encryption_established());
   EXPECT_TRUE(stream()->handshake_confirmed());
+  EXPECT_FALSE(stream()->IsResumption());
 }
 
 TEST_F(QuicCryptoClientStreamTest, ConnectedAfterTlsHandshake) {
@@ -109,6 +110,7 @@
   EXPECT_EQ(PROTOCOL_TLS1_3, stream()->handshake_protocol());
   EXPECT_TRUE(stream()->encryption_established());
   EXPECT_TRUE(stream()->handshake_confirmed());
+  EXPECT_FALSE(stream()->IsResumption());
 }
 
 TEST_F(QuicCryptoClientStreamTest,