Sepolicy: Introduce perfprofd binder service

Add policy for the perfprofd binder service.

For now, only allow su to talk to it.

Test: m
Change-Id: I690f75460bf513cb326314cce633fa25453515d6
diff --git a/private/service_contexts b/private/service_contexts
index 10d8d09..b8d05e2 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -111,6 +111,7 @@
 overlay                                   u:object_r:overlay_service:s0
 package                                   u:object_r:package_service:s0
 package_native                            u:object_r:package_native_service:s0
+perfprofd                                 u:object_r:perfprofd_service:s0
 permission                                u:object_r:permission_service:s0
 persistent_data_block                     u:object_r:persistent_data_block_service:s0
 phone_msim                                u:object_r:radio_service:s0