Revert "Autogenerate connectivity jarjar rules"

This reverts commit 53eb35cd828cc92d6cb25858ca87c9330d22dea9.

Reason for revert: b/233081774, caused long build times in FrameworkNetTests

Change-Id: Ide01c994f694b55fc0e87bb0e81584ac44196e68
diff --git a/framework/src/android/net/TcpSocketKeepalive.java b/framework/src/android/net/TcpSocketKeepalive.java
index 7131784..d89814d 100644
--- a/framework/src/android/net/TcpSocketKeepalive.java
+++ b/framework/src/android/net/TcpSocketKeepalive.java
@@ -24,9 +24,9 @@
 import java.util.concurrent.Executor;
 
 /** @hide */
-public final class TcpSocketKeepalive extends SocketKeepalive {
+final class TcpSocketKeepalive extends SocketKeepalive {
 
-    public TcpSocketKeepalive(@NonNull IConnectivityManager service,
+    TcpSocketKeepalive(@NonNull IConnectivityManager service,
             @NonNull Network network,
             @NonNull ParcelFileDescriptor pfd,
             @NonNull Executor executor,
@@ -50,7 +50,7 @@
      *   acknowledgement.
      */
     @Override
-    protected void startImpl(int intervalSec) {
+    void startImpl(int intervalSec) {
         mExecutor.execute(() -> {
             try {
                 mService.startTcpKeepalive(mNetwork, mPfd, intervalSec, mCallback);
@@ -62,7 +62,7 @@
     }
 
     @Override
-    protected void stopImpl() {
+    void stopImpl() {
         mExecutor.execute(() -> {
             try {
                 if (mSlot != null) {