Create new permissionmgr_service

We're creating a new PermissionManagerService that will handle
all of the permission related APIs. These are currently being
routed through PackageManagerService.

Test: Device boots
Change-Id: I7d08561dd33b692209c30d413cdca0ff567358f1
diff --git a/private/service_contexts b/private/service_contexts
index 1a9be8c..9fe7855 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -129,6 +129,7 @@
 package_native                            u:object_r:package_native_service:s0
 perfprofd                                 u:object_r:perfprofd_service:s0
 permission                                u:object_r:permission_service:s0
+permissionmgr                             u:object_r:permissionmgr_service:s0
 persistent_data_block                     u:object_r:persistent_data_block_service:s0
 phone_msim                                u:object_r:radio_service:s0
 phone1                                    u:object_r:radio_service:s0