Add a few dialogs that can be opened on the watch from the phone

[vaspa]

Add a few dialogs which could be invoked from Android as on an external screen and get back the selection results :

• select item from a list (e.g. for long lists page up (long press UP) and page down (long press DOWN) could help)
• confirmation dialog like: Yes/No/Cancel
• optionally: number spinner for choosing dates, time, codes, other numbers.