Rboard Manager Release 3.9.4

🚀 Release 3.9.4 (394000)

• Add a Reboot button to the theme download snackbar when using the Magisk method
• Add the name of Sounds, Flags, Preferences, Props to the popup
• Add more from us popup
• Add Sound Size & Last Update Date
• Hide Corner Prop if Gboard is newer than 14.7.xy
• Move all Rboard apps to about us screen
• Remove theme values preference
• Fixed all flags list crash
• Fix ThemeChangerActivity Orientation
• Fix Indonesian Locale Config
• Update Dependencies
• Update Submodules
• Update Workflow
• Bump Java to 22
• Bump versionCode to 394000 (3.9.4)