Settings: Add empty activity

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

app/src/main/java/com/wireguard/android/ProfileActivity.java

@@ -57,7 +57,7 @@ abstract class ProfileActivity extends ServiceClientActivity<ProfileServiceInter
     public abstract void onMenuSave(MenuItem item);
 
     public void onMenuSettings(MenuItem item) {
-
+        startActivity(new Intent(this, SettingsActivity.class));
     }
 
     @Override

app/src/main/java/com/wireguard/android/SettingsActivity.java

@@ -0,0 +1,11 @@
+package com.wireguard.android;
+
+import android.app.Activity;
+import android.os.Bundle;
+
+public class SettingsActivity extends Activity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+}