Sort SELinux package inclusion.

This section will be modified as part of splitting these packages into platform
and non-platform components.  Sort them all to avoid conflicts.

Bug: 31363362
Test: Builds
Change-Id: I91fb4d4d7c0a6971a19047ef2eb2981770a122ff
diff --git a/target/product/embedded.mk b/target/product/embedded.mk
index 5faf24f..78b61a6 100644
--- a/target/product/embedded.mk
+++ b/target/product/embedded.mk
@@ -79,12 +79,12 @@
 
 # SELinux packages
 PRODUCT_PACKAGES += \
-    sepolicy \
     file_contexts.bin \
-    seapp_contexts \
-    property_contexts \
     mac_permissions.xml \
+    property_contexts \
+    seapp_contexts \
     selinux_version \
+    sepolicy \
     service_contexts
 
 # Ensure that this property is always defined so that bionic_systrace.cpp