Update api/current.txt

Bug: 111696337
Bug: 36984840
Test: cts -m CtsNetTestCases -t android.net.http
Change-Id: I1af56f70ae905b3ede0195d0879c6fdc66352672
diff --git a/api/current.txt b/api/current.txt
index a1eb578..a5a245c 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -297,6 +297,7 @@
     method public java.util.Date getValidNotAfterDate();
     method public deprecated java.lang.String getValidNotBefore();
     method public java.util.Date getValidNotBeforeDate();
+    method public java.security.cert.X509Certificate getX509Certificate();
     method public static android.net.http.SslCertificate restoreState(android.os.Bundle);
     method public static android.os.Bundle saveState(android.net.http.SslCertificate);
   }