mediatek: Add a README and makefiles required for inclusion

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

Android.mk

@@ -0,0 +1,10 @@
+# Don't recurse into the platform makefiles. We don't care about them, and
+# we don't want to force a reset of BOARD_SEPOLICY_DIRS
+#
+# If you want to use these policies, add a
+#
+# include device/mediatek/sepolicy/sepolicy.mk
+#
+# to your device's BoardConfig. It is highly recommended that in case
+# you have your own BOARD_SEPOLICY_DIRS declaration,
+# the inclusion happens _before_ those lines

README.md

@@ -0,0 +1,19 @@
+# SELinux policy for MediaTek devices
+
+Don't recurse into the platform makefiles. We don't care about them, and we
+don't want to force a reset of `BOARD_SEPOLICY_DIRS`.
+
+If you want to use these policies, add a
+
+    include device/mediatek/sepolicy/sepolicy.mk
+
+to your device's BoardConfig. It is highly recommended that in case you have
+your own `BOARD_SEPOLICY_DIRS` declaration, the inclusion happens _before_
+those lines
+
+## Repository Details
+This repository uses [device/mediatek/wembley-sepolicy](https://android.googlesource.com/device/mediatek/wembley-sepolicy/) as base till `4769fb0d973bf079934054c6c5423ca06d67010a`.
+After that Google's device-specific changes starts.
+
+Till `4769fb0d973bf079934054c6c5423ca06d67010a`, this repository is similar to
+the **basic** sepolicy repository provided by MediaTek to the OEMs.

sepolicy.mk

@@ -0,0 +1,9 @@
+# Board specific SELinux policy variable definitions
+BOARD_SEPOLICY_DIRS := \
+        device/mediatek/sepolicy/non_plat
+
+BOARD_PLAT_PUBLIC_SEPOLICY_DIR := \
+        device/mediatek/sepolicy/plat_public
+
+BOARD_PLAT_PRIVATE_SEPOLICY_DIR := \
+        device/mediatek/sepolicy/plat_private