Fixed synchronization issue and added French and German translation

• Fixed synchronisation issues after reconnection. Thanks @TrianguloY for the contribution
• Added string localisation to determine bedtime status and German translation for bedtime mode. Thanks @patheticpat for the contribution.
• Added French translation for bedtime mode. Thanks @guyaumetremblay for the contribution.

Only the mobile app needs to be updated, no changes are done in the wear os app.