Chore: update name suggestion index

app/src/main/java/org/mapcomplete/MainActivity.java

@@ -4,14 +4,16 @@ import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.net.Uri;
 import android.os.Bundle;
+import android.provider.ContactsContract;
 import android.util.Log;
+import android.window.OnBackInvokedDispatcher;
 
+import androidx.annotation.NonNull;
 import androidx.core.app.ActivityCompat;
 import androidx.core.content.ContextCompat;
 
 import com.getcapacitor.BridgeActivity;
 import com.getcapacitor.JSObject;
-import com.getcapacitor.Plugin;
 import com.getcapacitor.PluginCall;
 
 import java.util.Objects;
@@ -20,6 +22,7 @@ public class MainActivity extends BridgeActivity {
 
     private PluginCall locationRequest = null;
     private PluginCall authRequest = null;
+    private PluginCall backbutton = null;
 
     private JSObject loginToken = null;
 
@@ -33,11 +36,28 @@ public class MainActivity extends BridgeActivity {
         });
         Databridge.addResponder("request:login", pluginCall -> {
             this.authRequest = pluginCall;
-            if(this.loginToken != null){
+            if (this.loginToken != null) {
                 pluginCall.resolve(this.loginToken);
             }
         });
+
+        Databridge.addResponder("backbutton", responder -> {
+            System.out.println("Received back button responder");
+            this.backbutton = responder;
+            responder.setKeepAlive(true);
+        });
+
         super.onCreate(savedInstanceState);
+
+
+        getOnBackInvokedDispatcher().registerOnBackInvokedCallback(OnBackInvokedDispatcher.PRIORITY_OVERLAY,
+                () -> {
+                    System.out.println("Back button pressed");
+                    if(this.backbutton != null){
+                        Databridge.sendAnswerTo(this.backbutton, "backbutton pressed");
+                    }
+                }
+        );
     }
 
     private void requestPermission() {
@@ -75,7 +95,7 @@ public class MainActivity extends BridgeActivity {
             res.put("value", obj);
             Log.i("main", "Resolving auth call, param is " + token);
             this.loginToken = res;
-            if(this.authRequest != null){
+            if (this.authRequest != null) {
                 this.authRequest.resolve(res);
             }
             return;
@@ -84,6 +104,14 @@ public class MainActivity extends BridgeActivity {
         System.out.println("Intercepted URL: " + url);
     }
 
+    @NonNull
+    @Override
+    public OnBackInvokedDispatcher getOnBackInvokedDispatcher() {
+
+        return super.getOnBackInvokedDispatcher();
+    }
+
+
     @Override
     public void onRequestPermissionsResult(
             int requestCode,