MoKee port

Change-Id: I83cd609f1b8b0bafdd8f13255d947828e9ac1b58
enable dexopt for MoKee release

Change-Id: I826fb04b0aabb05a66b051820496cc7714c48b0b
Use prebuilt TWRP recovery image

Change-Id: Ifda190da3662de77c246a88bfc2c97bdcec894a3