Add a tzdata test exports to be consumed by users of tzdata prebuilts. am: d79ea5826b am: 1217ee7135

Original change: https://android-review.googlesource.com/c/platform/system/timezone/+/1545427

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I06414b80c20f085b01fb66445aa357ad35806b94