lmkd: Implement lmkd-test

(cherry pick from commit 5f5b30e5)

lmkd-test executes alloc-stress native application and monitors kernel
logs for OOM kills.

Bug: 63631020

Change-Id: Ia9441cc5f8e283131f0bc839cb808a911bcdb168
Merged-In: Ia9441cc5f8e283131f0bc839cb808a911bcdb168
Signed-off-by: Suren Baghdasaryan <surenb@google.com>