Add jdk.net classes into EXPECTED_UPSTREAM

The libcore-compare-upstreams tool is used to guess the version of each
file by comparing the diff.

Bug: 111603149
Test: ojluni_refresh_files
Change-Id: I6ed0489dc2a775b8a351a150ae2f21e698fc1ad2
diff --git a/EXPECTED_UPSTREAM b/EXPECTED_UPSTREAM
index d9780b0..bae7348 100644
--- a/EXPECTED_UPSTREAM
+++ b/EXPECTED_UPSTREAM
@@ -1333,3 +1333,7 @@
 ojluni/src/main/java/jdk/internal/reflect/Reflection.java,jdk11u/jdk-11+28,src/java.base/share/classes/jdk/internal/reflect/Reflection.java
 ojluni/src/main/java/jdk/internal/util/Preconditions.java,jdk11u/jdk-11+28,src/java.base/share/classes/jdk/internal/util/Preconditions.java
 ojluni/src/main/java/jdk/internal/vm/annotation/Stable.java,jdk11u/jdk-11+28,src/java.base/share/classes/jdk/internal/vm/annotation/Stable.java
+ojluni/src/main/java/jdk/net/ExtendedSocketOptions.java,jdk8u/jdk8u121-b13,jdk/src/share/classes/jdk/net/ExtendedSocketOptions.java
+ojluni/src/main/java/jdk/net/NetworkPermission.java,jdk8u/jdk8u121-b13,jdk/src/share/classes/jdk/net/NetworkPermission.java
+ojluni/src/main/java/jdk/net/SocketFlow.java,jdk8u/jdk8u121-b13,jdk/src/share/classes/jdk/net/SocketFlow.java
+ojluni/src/main/java/jdk/net/Sockets.java,jdk8u/jdk8u121-b13,jdk/src/share/classes/jdk/net/Sockets.java