OpenJDK 11: Merging in java.util.EnumMap/Set

This is part of merging upstream changes from OpenJDK 11.28. This CL
updates java.util.Map/Set.

Bug: 198640665
Test: m droid
Test: atest EnumMapTest
Test: atest EnumSetTest
Test: atest CtsLibcoreOjTestCases:test.java.util.EnumMap.{\TestName}
Test: atest CtsLibcoreOjTestCases:test.java.util.EnumSet.{\TestName}
Change-Id: I7251c33c8469d4f098367d34376310a133861f90
16 files changed