Process method flags uniformly in the profile

We used to have two main ways to add methods in profiles: one which would
assume methods are hot and another one where we had to specify the method
flags explicitly. This created some implicit assumptions when adding new
methods that made it hard to follow which methods sets what.

This CL unify the way flags are processed removing any assumptions of flags.

Bug: 139884006
Test: m test-art-host

Change-Id: Ib1dcfdd4a5220507b89e3e0947252cef4fa2eb4c
3 files changed