Don't deoptimize everything with can_access_local_variables

Change the can_access_local_variables setup to not need to deoptimize
everything immediately. Instead ensure all methods are
async-deoptimizable and deoptimize the thread we are examining prior
to examining the stack.

Test: ./test.py --host -j50
Bug: 33616143
Bug: 34414073
Change-Id: I312a4865c09e63a8d3fe3b2d201f1c071fb4305f