apexqtmo: Clean up Samsung device inheritance

* Separate apexqtmo from d2lte
* Do not dex to /cache
* Split proprietary lib handling between msm8960-common and device trees
* Move apexq-specific init items to init.target.rc

Change-Id: Iefa4da9e3b36034c5cdfab2029b328b7cda3d1f8