Add test for SslError.getCertificate()

Bug: 129200144
Test: cts -m CtsNetTestCases -t android.net.http.cts
Change-Id: I1b23746865a4bffc90847b30384defd2c7d49879
Merged-In: I1b23746865a4bffc90847b30384defd2c7d49879
(cherry picked from commit befb9b0798da57d3f0a9b3ed214377296025bda2)
diff --git a/tests/cts/net/src/android/net/http/cts/SslErrorTest.java b/tests/cts/net/src/android/net/http/cts/SslErrorTest.java
index 850a8b6..0058c90 100644
--- a/tests/cts/net/src/android/net/http/cts/SslErrorTest.java
+++ b/tests/cts/net/src/android/net/http/cts/SslErrorTest.java
@@ -77,4 +77,9 @@
         SslError error = new SslError(SslError.SSL_EXPIRED, mCertificate);
         assertEquals(error.getUrl(), "");
     }
+
+    public void testGetCertificate() {
+        SslError error = new SslError(SslError.SSL_EXPIRED, mCertificate);
+        assertEquals(mCertificate, error.getCertificate());
+    }
 }