m8: offmode charging for lollipop

* Rid ourselves of lpm.rc and instead use the on charger trigger
* Add selinux policies to go along with this

Change-Id: I9beac06692111f8579dd27dce2269383112a1d57
(cherry picked from commit 4b2023081c2a1eb632c7d12e35793752de3a527d)