Add missing OpenJDK file list entry

java.net.SocketSecrets is accessed only by reflection from jdk.net.Sockets, thus
this missing entry was not caught by tests that does not exercise such code path.

Test: Passes CTS tests
Change-Id: Id598dbd17bd7d32f084b7c27a317d47b2e4fb7ff
diff --git a/openjdk_java_files.mk b/openjdk_java_files.mk
index 1ab9ed6..118e687 100644
--- a/openjdk_java_files.mk
+++ b/openjdk_java_files.mk
@@ -295,6 +295,7 @@
     ojluni/src/main/java/java/net/SocketOptions.java \
     ojluni/src/main/java/java/net/SocketOutputStream.java \
     ojluni/src/main/java/java/net/SocketPermission.java \
+    ojluni/src/main/java/java/net/SocketSecrets.java \
     ojluni/src/main/java/java/net/SocketTimeoutException.java \
     ojluni/src/main/java/java/net/SocksConsts.java \
     ojluni/src/main/java/java/net/SocksSocketImpl.java \