ProfileActivity: Do menus correctly

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

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

@@ -1,5 +1,6 @@
 package com.wireguard.android;
 
+import android.content.Intent;
 import android.view.MenuItem;
 
 /**
@@ -8,12 +9,18 @@ import android.view.MenuItem;
 
 public class ProfileEditActivity extends ProfileActivity {
     @Override
-    public void onMenuEdit(MenuItem item) {
-        throw new IllegalStateException();
-    }
-
-    @Override
-    public void onMenuSave(MenuItem item) {
-
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.menu_action_edit:
+                throw new IllegalStateException();
+            case R.id.menu_action_save:
+                finish();
+                return false;
+            case R.id.menu_settings:
+                startActivity(new Intent(this, SettingsActivity.class));
+                return true;
+            default:
+                return false;
+        }
     }
 }