Revert "fake proc name failed on LRX21R"

This reverts commit 185e7608ae.

src/main/scala/com/github/shadowsocks/ShadowsocksVpnService.scala

@@ -320,9 +320,13 @@ class ShadowsocksVpnService extends VpnService with BaseService {
     else
       cmd += " --dnsgw %s:8153".format(PRIVATE_VLAN.format("1"))
 
+    if (Utils.isLollipopOrAbove) {
+      cmd += " --fake-proc";
+    }
+
     if (BuildConfig.DEBUG) Log.d(TAG, cmd)
 
-    Tun2Socks.start(cmd.split(" "))
+    System.exec(cmd);
   }
 
   /** Called when the activity is first created. */