Update the GetFieldObject calls behind the read barrier macros.
Update the GetFieldObject calls behind the read barrier macros.

This is a leftover from changes 92535 and 93191.

Bug: 12687968
Change-Id: I4f09d258d037546c716b78d6f1ae6abe5af1137d

treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst