[Berberis][CrashReporting] Improving accessor library

To open .so under /system folder, we will need to add /system namespace.

Also add apex rule so that crash_dump can depend on this lib.

Bug: b/321799516
Test: m
Manually test can call the LoadGuestStateRegisters.

Change-Id: I1a30b3ba009a5e4101371e3d15367ece35b54a4c
3 files changed