Add SELinux service for RoleManagerService

Test: ensure no build failures;
add RoleManagerService as a boot phase
ensure no SecurityException in logcat on boot
Change-Id: Ia0803c0fb084fe2b12f5c20f5e46354d0dd1aedf
diff --git a/private/service_contexts b/private/service_contexts
index de1c2e0..cdf6521 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -142,6 +142,7 @@
 radio.sms                                 u:object_r:radio_service:s0
 recovery                                  u:object_r:recovery_service:s0
 restrictions                              u:object_r:restrictions_service:s0
+role                                      u:object_r:role_service:s0
 rttmanager                                u:object_r:rttmanager_service:s0
 samplingprofiler                          u:object_r:samplingprofiler_service:s0
 scheduling_policy                         u:object_r:scheduling_policy_service:s0