Code cleanup between debugger and jit.

This is to allow secondary dex files to be fully compiled.

- No need to do full deopt anymore for breakpoints: code in boot.oat
  is deoptimized as soon as the debugger attaches (and we decided that
  existing frames could not be debugged), and application being
  debugged is compiled debuggable.

- jit should only call UpdateMethodsCode if exit stubs are not
  installed due to lock violation otherwise (the lock level of the
  jit code cache is lower than the deoptimization lock).
  This part needs an overall cleanup beyond the scope of this change.

Change-Id: I38d85dcb270db746c1d6b0ceb7893a1aad8c9655