remove themes engine leftovers

Change-Id: Ia97ef0f221491141947427d6816a195ad704a762
merge extra/cm packages/repos treatment of all devices as packages/pa_common.mk

Change-Id: I39c1d04bceb4c84eaccb32af6ccdb9419c1e2f06
merge all repos/projects/packages treatment as addons

Change-Id: I9a30032dbe003fc14a0df647045c211075b2f5cc