Initial import of sdm660 family

* X00T: UL-ASUS_X00T-WW-17.2017.2006.429-user
* sdm660-common & X01BD: UL-ASUS_X01BD-WW-17.2018.2004.424-user

Change-Id: Ib4f2b44366ee6e0876248b720505e9fa028651b9

sdm660-common/proprietary/etc/init/wfdservice.rc

@@ -0,0 +1,14 @@
+service wfdservice /system/bin/wfdservice
+    class main
+    user system
+    group audio camera inet uhid drmrpc media_rw media input net_admin
+    #removed these because of limit of 12 groups
+    #graphics net_bt net_bt_admin bluetooth
+    disabled
+    oneshot
+
+on property:vendor.wfdservice=enable
+    start wfdservice
+
+on property:vendor.wfdservice=disable
+    stop wfdservice