Add Europe/Warsaw to timezone list

This fixes the immediate P1 bug. It's not clear how current list is chosen and what else should be added, but that's a larger redesign that probably involves moving to two level timezone selection (region and then timezone within region)

Bug: 401083965
Flag: NONE resource change
Tested: manual through TV Settings
Change-Id: I74a5c0ccb2c9c8b774230ea7d562bfbce3566ea2