Enable libstagefright_bufferqueue_helper_novndk from system

There was a link error that process from vendor fails to find
libstagefright_bufferqueue_helper_novndk.so which was only in the
swcodec APEX. To fix this issue, this change enables the library also
from the system libraries.

Bug: 150257951
Test: m -j passed & Tested from betty
Change-Id: I0f6568e043a9ff1b7fdfe059d0619895efffe67d