Add policy for property ro.android.security.keystore2.enable

Bug: 171563717
Bug: 171305684
Test: N/A
Change-Id: I323081fd2ce2fee80951c3d1e19b9935e4596705
diff --git a/private/system_server.te b/private/system_server.te
index 104bd97..031ea95 100644
--- a/private/system_server.te
+++ b/private/system_server.te
@@ -1202,6 +1202,9 @@
 # Read/Write /proc/pressure/memory
 allow system_server proc_pressure_mem:file rw_file_perms;
 
+# TODO Remove this property when Keystore 2.0 migration is complete b/171563717
+get_prop(system_server, keystore2_enable_prop)
+
 # dexoptanalyzer is currently used only for secondary dex files which
 # system_server should never access.
 neverallow system_server dexoptanalyzer_exec:file no_x_file_perms;