Add tests for loading native libraries in various locations through am: 6d1693115f am: 696aa73d4c am: 6f63e1f987

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

Change-Id: I3b369a77bab3894a589f7e18a254f5e15c003f96
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>