Add rules for lpdump and lpdumpd

- lpdump is a binary on the device that talks to lpdumpd
  via binder.

- lpdumpd is a daemon on the device that actually reads
  dynamic partition metadata. Only lpdump can talk to it.

Bug: 126233777
Test: boots (sanity)
Test: lpdump

Change-Id: I0e21f35ac136bcbb0603940364e8117f2d6ac438
diff --git a/private/service_contexts b/private/service_contexts
index 7ee4827..de56972 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -103,6 +103,7 @@
 location                                  u:object_r:location_service:s0
 lock_settings                             u:object_r:lock_settings_service:s0
 looper_stats                              u:object_r:looper_stats_service:s0
+lpdump_service                            u:object_r:lpdump_service:s0
 media.aaudio                              u:object_r:audioserver_service:s0
 media.audio_flinger                       u:object_r:audioserver_service:s0
 media.audio_policy                        u:object_r:audioserver_service:s0