Sepolicy setup for /data/misc/connectivityblobdb/

Create a new folder for connectivity blobs, to be used by
ConnectivityBlobStore for VPN and WIFI to replace legacy
keystore.
System server will need permissions to manage databases in the
folder and system server will create the folder in init.rc.

Bug: 307903113
Test: checkfc -t private/file_contexts contexts/plat_file_contexts_test
Test: build and manual test.
Change-Id: Ib51632af9624d8c3ebf2f752547e162a3fbbb1b0
diff --git a/private/file_contexts b/private/file_contexts
index e22a470..a3986f9 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -649,6 +649,7 @@
 /data/misc/bluedroid/\.a2dp_data u:object_r:bluetooth_socket:s0
 /data/misc/camera(/.*)?         u:object_r:camera_data_file:s0
 /data/misc/carrierid(/.*)?      u:object_r:radio_data_file:s0
+/data/misc/connectivityblobdb(/.*)? u:object_r:connectivityblob_data_file:s0
 /data/misc/dhcp(/.*)?           u:object_r:dhcp_data_file:s0
 /data/misc/dhcp-6\.8\.2(/.*)?     u:object_r:dhcp_data_file:s0
 /data/misc/dmesgd(/.*)?         u:object_r:dmesgd_data_file:s0