Add tests for loading native libraries in various locations through am: 6d1693115f am: 696aa73d4c

Original change: https://android-review.googlesource.com/c/platform/art/+/2309274

Change-Id: I2d3db70187ee1536b8e38f89bb8c28f32b8b4c64
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>