Relabel various exported3_default_prop

This removes bad context names "exported*_prop". Property contexts of
following properties are changed. All properties are settable only by
vendor-init.

- ro.config.per_app_memcg
This becomes lmkd_config_prop.

- ro.zygote
This becomes dalvik_config_prop.

- ro.oem_unlock_supported
This becomes oem_unlock_prop. It's readable by system_app which includes
Settings apps.

- ro.storage_manager.enabled
This becomes storagemanagr_config_prop. It's readable by coredomain.
Various domains in coredomain seem to read it.

- sendbug.preferred.domain
This bcomes sendbug_config_prop. It's readable by appdomain.

There are still 3 more exported3_default_prop, which are going to be
tracked individually.

Bug: 155844385
Test: selinux denial check on Pixel devices
Change-Id: I340c903ca7bda98a92d0f157c65f6833ed00df05
diff --git a/private/compat/30.0/30.0.cil b/private/compat/30.0/30.0.cil
index c2babb8..8673b62 100644
--- a/private/compat/30.0/30.0.cil
+++ b/private/compat/30.0/30.0.cil
@@ -1367,8 +1367,11 @@
     lmkd_config_prop
     media_config_prop
     mediadrm_config_prop
+    oem_unlock_prop
     packagemanager_config_prop
     recovery_config_prop
+    sendbug_config_prop
+    storagemanager_config_prop
     telephony_config_prop
     tombstone_config_prop
     vts_status_prop