Fix ddms allocation tracking.
Fix ddms allocation tracking.

This broke when ClassHelper and MethodHelper started returning pointers
that don't outlast their own lifetimes. Just copy everything (and add
an assertion that we never fail to find anything in the tables).

Change-Id: Ifcc59a62f325bf3dca8bb5fdd3089cc8431c8957

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