Migrated dexlist from Dalvik (libdex) into Art (libart)

Rationale:
The new dexlist (temporarily called dexlist2 until we are
satisfied with the migration) is a re-implementation of the
original dexlist utility that was based on Dalvik functions
in libdex into a new dexlist that is now based on Art functions
in libart instead.

Bug: 22322814
Change-Id: I0f034d66c1a1f3c5450423f57fcdc23e2f5a1e29