Add MaterialDateTimePicker

[AgustinBonilla]

This control is a picker that allows you to select and display both things at the same time (date and time), we will have to analyze well how it can be done on each platform and implement this control.

I understand that iOS has support for this with an XF control, but in Android, I understand that it does not have support and we will have to see if a DatePicker followed by a TimePicker can be displayed to make both selections.