OpenJDK 11: Merging in java.util.concurrent.atomic.AtomicLong

This is part of merging upstream changes from OpenJDK 11.28 It
updates the AtomicLong class. Its implementation makes use of
VarHandle.

Test: m
Test: atest CtsLibcoreOjTestCases
Test: atest AtomicLongTest
Bug: 188889082
Change-Id: Icee570321890dd7bf7b154f28c1c49e53a2d90a5
3 files changed