Revert^2 "Add SELinux policies for new ProtoLog service"

This reverts commit e4a06cb8f2502bf949abe22863ad15f7b23c3cf4.

Reason for revert: re-land change

Change-Id: Icf4dc74159aea95e5efc214825539e0f23f1958a
diff --git a/private/service_contexts b/private/service_contexts
index 06b8ff1..b4163d8 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -370,6 +370,7 @@
 powerstats                                u:object_r:powerstats_service:s0
 power                                     u:object_r:power_service:s0
 profiling_service                         u:object_r:profiling_service:s0
+protolog                                  u:object_r:protolog_service:s0
 print                                     u:object_r:print_service:s0
 processinfo                               u:object_r:processinfo_service:s0
 procstats                                 u:object_r:procstats_service:s0