sepolicy for lazy starting HIDL services

Now hwservicemanager can send ctl.interface_start messages
to init.

Note that 'set_prop(ctl.*, "foo")' maps to property context
for ctl.foo.

Bug: 64678982
Test: hwservicemanager can start interfaces
Change-Id: I9ab0bacd0c33edb0dcc4186fa0b7cc28fd8d2f30

private/hwservicemanager.te

@@ -4,3 +4,5 @@ init_daemon_domain(hwservicemanager)
 
 add_hwservice(hwservicemanager, hidl_manager_hwservice)
 add_hwservice(hwservicemanager, hidl_token_hwservice)
+
+set_prop(hwservicemanager, ctl_default_prop)