Permit dropping caches from the shell through sys.drop_caches.
* Permits setting the sys.drop_caches property from shell.
* Permits init to read and write to the drop_caches file.
* Can only be set to 3 (drop_caches) and 0 (unset).
Bug: 178647679
Test: flashed user build and set property; no avc denials.
Test: flashed userdebug build and dropped caches w/o root.
Change-Id: Idcedf83f14f6299fab383f042829d8d548fb4f5d
diff --git a/private/property.te b/private/property.te
index de0caa4..e357b11 100644
--- a/private/property.te
+++ b/private/property.te
@@ -23,6 +23,7 @@
system_internal_prop(net_connectivity_prop)
system_internal_prop(netd_stable_secret_prop)
system_internal_prop(odsign_prop)
+system_internal_prop(perf_drop_caches_prop)
system_internal_prop(pm_prop)
system_internal_prop(rollback_test_prop)
system_internal_prop(setupwizard_prop)