dumpstate: reads ota_metadata_file

Bug: 137757435
Test: bugreport
Change-Id: I72a7d1e01e2f4a050220f77d62e5592a14925e17
diff --git a/private/dumpstate.te b/private/dumpstate.te
index cfa05fc..72e508e 100644
--- a/private/dumpstate.te
+++ b/private/dumpstate.te
@@ -58,3 +58,5 @@
 allow dumpstate gsid_exec:file rx_file_perms;
 set_prop(dumpstate, ctl_gsid_prop)
 binder_call(dumpstate, gsid)
+
+r_dir_file(dumpstate, ota_metadata_file)