Google Play release v3.8.0

Material You theme & New icon
- New Material You theme with many UI elements updated to the new design.
- On Android 12, Swift Backup will use 'Dynamic colors' obtained from the system. You can disable this feature using the toggle in Settings to make Swift Backup use its own theme colors instead of the system colors.

Note for OneDrive users
OneDrive official SDK now requires minimum Android 8. As a result, you can't use OneDrive below Android 8 with Swift Backup.

Other changes
- Apps: New 'Export apps list' action (Apps > Batch actions) to save the apps list as html with the apps' link to Play Store.

- Cloud: Dropbox has finally updated their app and fixed the authentication issues for apps targeting Android 11+. If you have Dropbox app installed, we're back to using it for authentication.

- Cloud: Fixed an issue where Dropbox oauth tokens were not getting refreshed after expiry

- Cloud: Fixed a crash with SFTP service when deleting a remote directory

- Cloud: Fixed an issue where SMB service wasn't using SMB 3x even when server supported it

- Removed Firebase Analytics

- Other minor UI fixes and optimizations related to file operations