ICU's TimeZone.toString() prints out too much information. Only the ID
is useful.
Bug: 149014708
Test: build only
Change-Id: I7d633f7946f82696e13dbc39749b6f9f44f83fa3
Merged-In: I7d633f7946f82696e13dbc39749b6f9f44f83fa3
(cherry picked from commit 06795ef740)