changed minSdk to 29 and also turned off backup in android manifest

android/app/build.gradle

@@ -45,7 +45,7 @@ android {
         applicationId "com.example.kmobile"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
-        minSdkVersion flutter.minSdkVersion
+        minSdkVersion 29
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName

android/app/src/main/AndroidManifest.xml

@@ -6,6 +6,7 @@
         android:label="kmobile"
         android:name="${applicationName}"
         android:usesCleartextTraffic="true"
+        android:allowBackup="false"
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name=".MainActivity"