Revert "Add StagingManager service."

This reverts commit 9eb3b8ff.

Reason for revert: We are deciding for now not to make StagingManager a fully-fledged binder service, as it will only be accessed by PackageInstaller. We might re-evaluate this decision later if needed.

Bug: 122072686
Change-Id: Ic2a53fc92ddd7d7eeccc6a4a0117f28724346ec7

private/compat/28.0/28.0.ignore.cil

@@ -74,7 +74,6 @@
     rss_hwm_reset_exec
     runtime_service
     sensor_privacy_service
-    staging_service
     super_block_device
     system_lmk_prop
     system_suspend_hwservice

private/service_contexts

@@ -166,7 +166,6 @@ simphonebook2                             u:object_r:radio_service:s0
 simphonebook                              u:object_r:radio_service:s0
 sip                                       u:object_r:radio_service:s0
 slice                                     u:object_r:slice_service:s0
-staging                                   u:object_r:staging_service:s0
 stats                                     u:object_r:stats_service:s0
 statscompanion                            u:object_r:statscompanion_service:s0
 soundtrigger                              u:object_r:voiceinteraction_service:s0

public/service.te

@@ -151,7 +151,6 @@ type servicediscovery_service, app_api_service, ephemeral_app_api_service, syste
 type settings_service, app_api_service, ephemeral_app_api_service, system_server_service, service_manager_type;
 type shortcut_service, app_api_service, system_server_service, service_manager_type;
 type slice_service, app_api_service, system_server_service, service_manager_type;
-type staging_service, system_server_service, service_manager_type;
 type statusbar_service, app_api_service, ephemeral_app_api_service, system_server_service, service_manager_type;
 type storagestats_service, app_api_service, ephemeral_app_api_service, system_server_service, service_manager_type;
 type system_update_service, system_server_service, service_manager_type;