Do not include common SE policies automatically

Automatic additions to BOARD_SEPOLICY_UNION from Android.mk do not
guarantee order or precedence of rules. More often than not, these
rules get included _after_ the device's own, which makes
it impossible for the device to extend them, or even to use types
defined here.

Manually include these in the device's BoardConfig with
"include device/qcom/sepolicy/sepolicy.mk" before
its own specific BOARD_SEPOLICY_DIRS (if any) instead. Or just
include files piecemeal.

Change-Id: I2ce0c3ec325906a46570b26c5f0c2018390d2ec9

Conflicts:
	Android.mk