API 28 DNS Privacy settings

[admitrevskiy]

#1851 (comment)

https://developer.android.com/about/versions/pie/android-9.0-changes-28#dns-privacy

[admitrevskiy]

Done (v3.3)

Testing instructions for QA:

• Reinstall AG on device with Android P+

• Enable DNS filtering and select regular server
• Enable Private DNS in Auto mode
• Start protection

Expected result:

• You will see notification
• Tap in Disable Private DNS should lead you to Android Wireless Network settings
• Tap on Change server should lead you to Select DNS server screen
• Notification will be visible until you change server to encrypted or disable Private DNS

• Enable DNS filtering and select any server
• Enable Private DNS in Provider mode
• Start protection

Expected result:

• You will see notification You are using Private DNS and connected to <server_name>
• Tap in Disable Private DNS should lead you to Android Wireless Network settings
• Notification will be visible until you disable Private DNS

[ameshkov]

Two issues with the current implementation:

1. AdGuard DNS in the notification text is misleading, replace it with DNS filtering.
2. Change the notification text. Instead of Please disable Private DNS it should be: If you want DNS filtering to work properly, please disable Private DNS in Android settings.
3. Tap on the notification should lead to DNS filtering settings.
4. We might need to limit this function to Android Q only because on Pie Private DNS can not work alongside a VPN at all

[admitrevskiy]

Done.