Move constants to MODULE_LIB

These constants are used by a MODULE_LIBRARIES API, they should
have the same visibility.

Test: ConnectivityServiceTest
Change-Id: I14cb189d949fe552f463cae3002801fd8cf8230c

framework/src/android/net/ConnectivityManager.java

@@ -976,7 +976,7 @@ public class ConnectivityManager {
      * Specify that the traffic for this user should by follow the default rules.
      * @hide
      */
-    @SystemApi
+    @SystemApi(client = MODULE_LIBRARIES)
     public static final int PROFILE_NETWORK_PREFERENCE_DEFAULT = 0;
 
     /**
@@ -986,7 +986,7 @@ public class ConnectivityManager {
      * if no such network is available.
      * @hide
      */
-    @SystemApi
+    @SystemApi(client = MODULE_LIBRARIES)
     public static final int PROFILE_NETWORK_PREFERENCE_ENTERPRISE = 1;
 
     /** @hide */