Fix NativeCryptoTest.

Author: juergw

openjdk/src/test/java/org/conscrypt/NativeCryptoTest.java

@@ -26,14 +26,17 @@
 import static org.conscrypt.NativeConstants.TLS1_1_VERSION;
 import static org.conscrypt.NativeConstants.TLS1_2_VERSION;
 import static org.conscrypt.NativeConstants.TLS1_VERSION;
+import static org.conscrypt.TestUtils.decodeHex;
 import static org.conscrypt.TestUtils.isWindows;
 import static org.conscrypt.TestUtils.openTestFile;
 import static org.conscrypt.TestUtils.readTestFile;
+import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertThrows;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 import static org.junit.Assume.assumeFalse;