upgraded kotlin, gradle, added drift

android/app/src/main/AndroidManifest.xml

@@ -1,13 +1,13 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.sendtrain.sendtrain">
-   <application
-        android:label="SendTrain"
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <application
+        android:label="sendtrain"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name=".MainActivity"
             android:exported="true"
             android:launchMode="singleTop"
+            android:taskAffinity=""
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
@@ -31,4 +31,15 @@
             android:name="flutterEmbedding"
             android:value="2" />
     </application>
+    <!-- Required to query activities that can process text, see:
+         https://developer.android.com/training/package-visibility and
+         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.
+
+         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.PROCESS_TEXT"/>
+            <data android:mimeType="text/plain"/>
+        </intent>
+    </queries>
 </manifest>

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

@@ -0,0 +1,5 @@
+package com.example.sendtrain
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity()

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

@@ -1,6 +0,0 @@
-package com.sendtrain.sendtrain
-
-import io.flutter.embedding.android.FlutterActivity
-
-class MainActivity: FlutterActivity() {
-}