m7-common: clean up overlay

* No real changes, just re-orders overlay items according to their
  ordering in frameworks/base.
* Satisfies my OCD.

Change-Id: Ie83ec98402bfe03e0ae3e2ad87fb65b20f41d581

Conflicts:

	overlay/frameworks/base/core/res/res/values/config.xml

Change-Id: Ie83ec98402bfe03e0ae3e2ad87fb65b20f41d581