change app name, add route calculator

android/app/src/main/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <application
-        android:label="mileograph_sbb_flutter"
+        android:label="mileograph_flutter"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
         <activity

android/app/src/main/kotlin/com/example/mileograph_sbb_flutter/MainActivity.kt

@@ -1,4 +1,4 @@
-package com.example.mileograph_sbb_flutter
+package com.example.mileograph_flutter
 
 import io.flutter.embedding.android.FlutterActivity