base

Update TimePicker widget and its related dialog

- the old TimePicker widget is still there for obvious layout compatibility reasons
- add a new delegate implementation for having a new UI based on a radial picker
- use the new delegate only for the TimePickerDialog (which does not need to be
the same)
- added support for Theming and light/dark Themes
- added support for I18N (hour formatting and time separator and also position of
AM/PM indicator coming from Unicode CLDR)
- added support for RTL
- verified support for Keyboard
- verified that CTS tests for TimePicker are passing (for both the legacy and the
new widgets)

Also added a new HapticFeedbackConstants.CLOCK_TICK and its related code for
enabling ticks vibration.

Change-Id: Ib9b53a152bd9e97383dc391ef8c26da91217298f