port-bridge: allow qti_init_shell to set properties on port-bridge

Create new property contexts for port-bridge and allow init_shell
to set ctl properties on these daemons to successfully start the
processes.

Fix the following denials

init: avc:  denied  { set } for property=ctl.port-bridge
scontext=u:r:qti_init_shell:s0 tcontext=u:object_r:
ctl_default_prop:s0 tclass=property_service
init: sys_prop: Unable to start service ctl [port-bridge]
uid:0 gid:0 pid:944

Change-Id: Ifee9c78d02eae33321c07aa349fcd6c3f123a7e2
diff --git a/common/property_contexts b/common/property_contexts
index 9354134..f23e47d 100644
--- a/common/property_contexts
+++ b/common/property_contexts
@@ -9,6 +9,7 @@
 radio.atfwd.               u:object_r:radio_prop:s0
 ctl.qmuxd                  u:object_r:ctl_qmuxd_prop:s0
 ctl.netmgrd                u:object_r:ctl_netmgrd_prop:s0
+ctl.port-bridge            u:object_r:ctl_port-bridge_prop:s0
 min_freq_0                 u:object_r:freq_prop:s0
 min_freq_4                 u:object_r:freq_prop:s0
 ctl.perfd                  u:object_r:perfd_prop:s0