Move mterp and switch interpreter to tiered JIT.

This is an intermediate step to move ProfilingInfo usage only within the
baseline compiler.

It also makes the system consistent with all intepreters now going to
baseline compilation before optimized.

Bug: 112676029
Test: test.py
Change-Id: I8505ca46ede9095683ac3f5f86f0c70335bed633
6 files changed