Change heap transitions + hspace compation to use VLOG(heap)
Change heap transitions + hspace compation to use VLOG(heap)

VLOG(gc) is spammy since it is enabled.

Change-Id: I07d1d40e2f19134f885d6777b60533a9010ae164

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