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/property_contexts b/private/property_contexts
index 3261014..3622d12 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -23,6 +23,7 @@
 ro.hw.                  u:object_r:system_prop:s0
 sys.                    u:object_r:system_prop:s0
 sys.cppreopt            u:object_r:cppreopt_prop:s0
+sys.lpdumpd             u:object_r:lpdumpd_prop:s0
 sys.powerctl            u:object_r:powerctl_prop:s0
 sys.usb.ffs.            u:object_r:ffs_prop:s0
 service.                u:object_r:system_prop:s0