Track licenses of dexpreopted bootjars

Propagate the license metadata for dexpreopted bootjars.  Requires
rewriting the generated module to look more like as Soong module so
that it can use LOCAL_SOONG_LICENSE_METADATA.

Bug: 224612665
Test: m alllicensemetadata reportmissinglicenses
Change-Id: Ibd3269594462a0c38a3427d0c7838620a9b84551