Update countryzones.txt / tests to new proto defn

The format was modified in commit
fc88022377acb94c0a8a59893b2ee690b8cb4580 but the
countryzones.txt was omitted from the commit
by mistake. This change also updates the associated
host unit tests.

Bug: 72144448
Test: manual: ran update-tzdata.py
Change-Id: Ic7ac6f5fe7cc7bd4061b426e259279d0b6b73362
2 files changed