Determines whether the Time pickers display in 24-hour or 12-hour clock format.
Applicable to Titanium.UI.PICKER_TYPE_TIME and Titanium.UI.PICKER_TYPE_DATE_AND_TIME picker types.
When this property is enabled, a time picker is displayed with hours 0 through 23, or with hours 1 through 12 and am/pm controls otherwise.
For backward compatibility, the default value of this property depends on the style of
picker in use.
For a spinner picker (when useSpinner is true), this defaults to true (24-hour format.)
For a native picker (when useSpinner is either un-set or false), this defaults to false
(12-hour format.)
The value of this property may be modified even after a picker is rendered and the UI will be updated accordingly.
Default: true (spinner enabled), false (otherwise)