Autostarts v2.1.0

• Replace RootUtils with Libsu
• Replace WebView with TextView in help page
• Display “Open in App Manager”

Full Changelog: v2.0.0...v2.1.0

Autostarts v2.0.0

• Migrate to Gradle
• Minimum SDK 21 and target SDK 29 (not sure if compile SDK needs to be set to 22 since it uses pre23 permissions)