Implement ITestCollector in ICU4CTest

The Done flag of CtsIcu4cTestCases is false while running the module
with "--collect-tests-only".
Implement ITestCollector in ICU4CTest, collect test cases without
running them.

Bug: 381760092
Test: cts-tradefed run cts --collect-tests-only --module CtsIcu4cTestCases

Change-Id: Ia09105d87ef1fdb23c92fcd58faad7ec210d8765
Signed-off-by: Tang, ChunqiangX <[email protected]>
Signed-off-by: Gao, Huadong <[email protected]>
Signed-off-by: Deng, Bing <[email protected]>
1 file changed