Track format version change in external/icu/

This commit is the result of updating the format version
in external/icu/ (see associated change) and running update-tzdata.py.

See the steps documented in system/timezone/README.android
"Changing the Time Zone Data Set Version".

Bug: 154605169
Test: build / boot
Test: atest CtsHostTzDataTests
Test: atest CtsIcuTestCases
Test: atest FrameworksServicesTests:com.android.server.timezone
Change-Id: I0b2b7353351720a923414e65cc64f77c9f3d3a47
8 files changed