[FIX] base: Fix condition on selection field always evaluating to True

Part/Fix of commit #e5796429

Issue

	The condition `default_type not in self._fields['type'].selection`
	always evaluate to True as the selection is list of (key, value)
	tuples.

Solution

	Replace the tuples by a list of possible values.

opw-2256905

closes odoo/odoo#52316

Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>