Add new context packagemanager_config_prop

To remove bad context names exported[23]_default_prop

Bug: 155844385
Test: m selinux_policy
Change-Id: Ic4bbc8e45d810368a96f6985c2234798e73be82d
Merged-In: Ic4bbc8e45d810368a96f6985c2234798e73be82d
(cherry picked from commit 072b01438e02e9d3cfba04c768e7a440549cc8b1)
diff --git a/private/system_server.te b/private/system_server.te
index 88e7228..7fe6f0b 100644
--- a/private/system_server.te
+++ b/private/system_server.te
@@ -694,6 +694,9 @@
 # Read/write persist.sys.dalvik.vm.lib.2
 set_prop(system_server, dalvik_runtime_prop)
 
+# Read ro.control_privapp_permissions and ro.cp_system_other_odex
+get_prop(system_server, packagemanager_config_prop)
+
 # Create a socket for connections from debuggerd.
 allow system_server system_ndebug_socket:sock_file create_file_perms;