Move system property rules to private

public/property split is landed to selectively export public types to
vendors. So rules happening within system should be in private. This
introduces private/property.te and moves all allow and neverallow rules
from any coredomains to system defiend properties.

Bug: 150331497
Test: system/sepolicy/tools/build_policies.sh
Change-Id: I0d929024ae9f4ae3830d4bf3d59e999febb22cbe
Merged-In: I0d929024ae9f4ae3830d4bf3d59e999febb22cbe
(cherry picked from commit 42c7d8966cc5f76c84c001c5af787cbfade736c8)
diff --git a/private/asan_extract.te b/private/asan_extract.te
index 1c20d78..69bcd50 100644
--- a/private/asan_extract.te
+++ b/private/asan_extract.te
@@ -3,6 +3,9 @@
 # Technically not a daemon but we do want the transition from init domain to
 # asan_extract to occur.
 with_asan(`
-typeattribute asan_extract coredomain;
-init_daemon_domain(asan_extract)
+  typeattribute asan_extract coredomain;
+  init_daemon_domain(asan_extract)
+
+  # We need to signal a reboot when done.
+  set_prop(asan_extract, powerctl_prop)
 ')