Commit 27.0 sepolicy prebuilts to master.

Bug: 65551293
Bug: 69390067
Test: None. Prebuilt only change.
Change-Id: I62304b342a8b52fd505892cc2d4ebc882148224b
diff --git a/prebuilts/api/27.0/private/users b/prebuilts/api/27.0/private/users
new file mode 100644
index 0000000..51b7b57
--- /dev/null
+++ b/prebuilts/api/27.0/private/users
@@ -0,0 +1 @@
+user u roles { r } level s0 range s0 - mls_systemhigh;