rkapdapp: sepolicy to write tcmd socket.

- any app using OkHttp stack needs tcmd socket access privilege.

- rkpdapp uses OkHttp stack, so it needs tcmd socket
 access privilege.

Change-Id: I0260936964caa8274490af69514b2cac9ac491fd

generic/private/rkpd_app.te

@@ -0,0 +1,4 @@
+#copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+#SPDX-License-Identifier: BSD-3-Clause-Clear
+
+unix_socket_connect(rkpdapp, vendor_dpmtcm, vendor_tcmd)