Add time zone version tests

Add tests to make it clear what expectations Android has about
versions and time zone files on devices.

testTimeZoneFormatVersion():

A sanity check of the time zone data set version numbers on a device.
Intended to show OEMs if they've done something obviously bad during
CTS.

testTzDataSetVersions()

Asserts that known sets of time zone files on a device meet a device's
format expectations.

Bug: 115612964
Bug: 119281180
Test: vogar src/test/java/libcore/libcore/icu/TimeZoneIntegrationTest.java
Change-Id: I561f0871e10399cfcd3575e9cc708eaac2cf8e2d
2 files changed