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/postinstall.te b/prebuilts/api/27.0/private/postinstall.te
new file mode 100644
index 0000000..363e362
--- /dev/null
+++ b/prebuilts/api/27.0/private/postinstall.te
@@ -0,0 +1,3 @@
+typeattribute postinstall coredomain;
+
+domain_auto_trans(postinstall, otapreopt_chroot_exec, otapreopt_chroot)