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/public/incident.te b/microdroid/sepolicy/system/public/incident.te
new file mode 100644
index 0000000..ce57bf6
--- /dev/null
+++ b/microdroid/sepolicy/system/public/incident.te
@@ -0,0 +1,8 @@
+# The incident command is used to call into the incidentd service to
+# take an incident report (binary, shared bugreport), download incident
+# reports that have already been taken, and monitor for new ones.
+# It doesn't do anything else.
+
+# incident
+type incident, domain;
+