global: java access control has important semantic meaning

It's not right to blindly follow all of AndroidStudio's suggestions,
especially for things in tunnel/ which comprise useful API.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

ui/src/main/java/com/wireguard/android/model/TunnelManager.java

@@ -161,7 +161,7 @@ public final class TunnelManager extends BaseObservable {
         completableTunnels.complete(tunnels);
     }
 
-    private void refreshTunnelStates() {
+    public void refreshTunnelStates() {
         Application.getAsyncWorker().supplyAsync(() -> Application.getBackend().getRunningTunnelNames())
                 .thenAccept(running -> {
                     for (final ObservableTunnel tunnel : tunnels)