Prepare the FormulaManagerView package
to handle theory replacement (e.g. bitvectors encoded as rationals)
by itself.
For this, all places where Formulas with arbitrary types are handled
need to call wrap/unwrap.

git-svn-id: https://svn.sosy-lab.org/software/cpachecker/trunk@14290 4712c6d2-40bb-43ae-aa4b-fec3f1bdfe4c