Consolidate installation logics from params/args classes

Move mLocks/mSettings/mPackages dependencies from InstallParams,
PackageHandler, VerificationParams into InstallPackageHelper.

Also cleaning up InitAndSystemPackageHelper to move some of the
core installation logic into InstallPackageHelper.

Current goal is to have the "core" installation logic in one place.
"core" means code blocks that uses mLock/mSettings/mPackages during
installation.

BYPASS_INCLUSIVE_LANGUAGE_REASON=need to deprecate some old constant
names first

BUG: 198177734
BUG: 201815903
Test: manual
Change-Id: Idb2bf634ce58e968846d6f56c1d501ee8b3aafa3