[Cronet] Add test jni lib am: 4a755a7a99 am: 8efe983ff7

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2498162

Change-Id: Icba0466f58cab3819273fffef75a115f0d3aaa0b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>