Improve code style of ICU4CTest

It's a follow-up CL for http://aosp/3064523

Bug:  381760092
Test: cts-tradefed run cts --collect-tests-only --module CtsIcu4cTestCases
Merged-In: Id856e3831d53cc102de77d28bca5b62d8b6ac295
Change-Id: Id856e3831d53cc102de77d28bca5b62d8b6ac295
(cherry picked from commit d470b30ee127f08e4c127b747ba7ec816f10b8c6)
1 file changed