Add microdroid specific sepolicy

Microdroid will have a separate sepolicy, apart from the core policy.
This is the first step; For now it's a simple copy of system/sepolicy.
For the future work, it will be stripped.

Bug: 189165759
Test: boot microdroid and see selinux enforced
Change-Id: I2fee39f7231560b49c93bd5e8d0feeffada40938
diff --git a/microdroid/sepolicy/system/private/wificond.te b/microdroid/sepolicy/system/private/wificond.te
new file mode 100644
index 0000000..8bf37ca
--- /dev/null
+++ b/microdroid/sepolicy/system/private/wificond.te
@@ -0,0 +1,9 @@
+typeattribute wificond coredomain;
+
+set_prop(wificond, wifi_hal_prop)
+set_prop(wificond, wifi_prop)
+set_prop(wificond, ctl_default_prop)
+
+get_prop(wificond, hwservicemanager_prop)
+
+init_daemon_domain(wificond)