Add policy for apexd.

apexd is a new daemon for managing APEX packages installed
on the device. It hosts a single binder service, "apexservice".

Bug: 112455435
Test: builds, binder service can be registered,
      apexes can be accessed, verified and mounted
Change-Id: I634ad100f10b2edcd9a9c0df0d33896fa5d4ed97
diff --git a/private/crash_dump.te b/private/crash_dump.te
index 831ff04..fe25bad 100644
--- a/private/crash_dump.te
+++ b/private/crash_dump.te
@@ -2,6 +2,7 @@
 
 allow crash_dump {
   domain
+  -apexd
   -bpfloader
   -crash_dump
   -init