Stop mixing and matching platform and NDK.

The library was being built with the NDK, but the test is being built
with the platform, in this case building against the NDK STL headers
and then using the platform library, which are not ABI compatible.

Bug: http://b/27801981
Change-Id: I7386dfe6ac73334d7c1b1e0cbc8dc346c84313bf
1 file changed