Revert "Correctly handle instrumenting threads multiple times."

This CL is incorrect in multiple ways. First it is way too strict with
the checks about where additional methods can be. More importantly we
cannot bail-out early without breaking the instrumentation stack.

This is linked with the next CL that fixes this correctly.

This reverts commit 055407c8.

Test: build.
Bug: 67384421
Bug: 74386428

Change-Id: I745a8e88a5789f68794faaa705c82ed81b8fb29f