fix: dublicate dtmf

Reviewed-on: #56
Co-authored-by: Florian Griffon <florian.griffon@epitech.eu>
Co-committed-by: Florian Griffon <florian.griffon@epitech.eu>

dialer/android/app/src/main/kotlin/com/icing/dialer/activities/MainActivity.kt

@@ -190,6 +190,15 @@ class MainActivity : FlutterActivity() {
                             result.error("SPEAKER_FAILED", "No active call or failed to set speaker", null)
                         }
                     }
+                    "isDefaultDialer" -> {
+                        val isDefault = isDefaultDialer()
+                        Log.d(TAG, "isDefaultDialer called, returning: $isDefault")
+                        result.success(isDefault)
+                    }
+                    "requestDefaultDialer" -> {
+                        checkAndRequestDefaultDialer()
+                        result.success(true)
+                    }
                     "sendDtmfTone" -> {
                         val digit = call.argument<String>("digit")
                         if (digit != null) {