adds activityResult to improve promise usability on Android (#31)

* Add activityResult to improve promise usability
* Adds comment on new code

---------

Co-authored-by: Joan Roa <jsroa@softcaribbean.com>

android/src/main/java/nl/raphael/settings/NativeSettingsPlugin.java

@@ -6,10 +6,12 @@
 
 import android.content.Intent;
 import android.net.Uri;
+import androidx.activity.result.ActivityResult;
 import com.getcapacitor.JSObject;
 import com.getcapacitor.Plugin;
 import com.getcapacitor.PluginCall;
 import com.getcapacitor.PluginMethod;
+import com.getcapacitor.annotation.ActivityCallback;
 import com.getcapacitor.annotation.CapacitorPlugin;
 
 @CapacitorPlugin(name = "NativeSettings")
@@ -57,10 +59,14 @@ private void openOption(PluginCall call, String setting) {
             intent.setAction(setting);
         }
 
-        // Start intent in activity.
-        getActivity().startActivity(intent);
+        startActivityForResult(call, intent, "activityResult");
+    }
 
-        // Send response.
+    /**
+     * Send response on activityResult (when intent closes)
+     */
+    @ActivityCallback
+    private void activityResult(PluginCall call, ActivityResult result) {
         JSObject js = new JSObject();
         js.put("status", true);
         call.resolve(js);