Implement the time synchronization between ADC and Android device

[GrazianoCapelli]

We should implement a synchronization method between the ADC time and the time of Android device (usually the smartphone time is synchronized with the NTP).
An option to sync the time on app start should be present in the Settings.

When the app starts, it sends the Android time (NTP time) to the ADC. The ADC will update its time as requested.

I think 1 second of accuracy is enough for now. We'll implement a more accurate method when needed.