tzdata: Set min_sdk_version to "30"

Just a cosmetic cleanup since "R" resolves to 30 as well.

Test: m
Bug: 171330443
Merged-In: I9846b24a55dffbbf728f35a9708f8ddd07545b6d
Change-Id: I9846b24a55dffbbf728f35a9708f8ddd07545b6d
(cherry picked from commit cc7af28f158b79e4f661c4dc78c20c5d7684ab70)
1 file changed