Add tests for java.util APIs

Bug: 119393918
Bug: 182168282
Test: atest CtsLibcoreTestCases:libcore.java.util
Change-Id: I7c37f7feee751f482570b668d01284b6715799a7
(cherry picked from commit e5fcdc2e9be456da56314742f3c8d4e697c0398b)
Merged-In: I7c37f7feee751f482570b668d01284b6715799a7
9 files changed