epicmtd: Switch to mini phone config.

Excludes common_full.mk (Live wallpapers, video editing, etc)
which frees up 20+ MB from our overloaded /system.

Change-Id: I5546d0d23fcbdc3661d19df8b8393f8368fda0f7
(cherry picked from commit cbd430d50096979ac9aabc8247e16d32ca4e6752)