libandroid_net is a subset of libandroid exposing the multinetwork
functionality. Contrary to libandroid which is not available to vendors,
libandroid_net is available to vendors as ll-ndk.
However, the header path for the two libraries are different.
for libandroid:
include <android/multinetwork.h>
for libandroid_net:
include <multinetwork.h>
This is because multinetwork.h is located in
<home_of_libandroid_net>/include directory. Since many vendors are using
<android/multinetwork.h>, we need to have a subdirectory 'android'.
Bug: 63120916
Test: build
Change-Id: I1cbc6e1641edda2013c80f9b16b825f0854776c1
7a4f741f56