Implement getByte/putByte intrinsics

Note that in Android we don't use the volatile, release, or
acquire versions for get/putByte.

Bug: 313284159
Test: art/test/testrunner/testrunner.py --target --64 --optimizing
Change-Id: Ic0953db52e2721f90e81bb600eaa95395941f578
8 files changed