[MS74] Expose NetworkTemplate#matches

This is used by NetworkPolicyManagerService to find
relevant networks of a given NetworkPolicy.

Test: TH
Bug: 204830222
Change-Id: I7176ab727bf208e0fd05ecb9c2bcb00cd3438031

core/api/module-lib-current.txt

@@ -345,6 +345,7 @@ package android.net {
     method public int getRoaming();
     method @NonNull public java.util.Set<java.lang.String> getSubscriberIds();
     method @NonNull public java.util.Set<java.lang.String> getWifiNetworkKeys();
+    method public boolean matches(@NonNull android.net.NetworkIdentity);
     method public void writeToParcel(@NonNull android.os.Parcel, int);
     field @NonNull public static final android.os.Parcelable.Creator<android.net.NetworkTemplate> CREATOR;
     field public static final int MATCH_BLUETOOTH = 8; // 0x8

packages/ConnectivityT/framework-t/src/android/net/NetworkTemplate.java

@@ -652,7 +652,9 @@ public final class NetworkTemplate implements Parcelable {
      *
      * @hide
      */
-    public boolean matches(NetworkIdentity ident) {
+    @SystemApi(client = MODULE_LIBRARIES)
+    public boolean matches(@NonNull NetworkIdentity ident) {
+        Objects.requireNonNull(ident);
         if (!matchesMetered(ident)) return false;
         if (!matchesRoaming(ident)) return false;
         if (!matchesDefaultNetwork(ident)) return false;