Add min_score_adj into LmkKillOccurred event

Log min_score_adj when lmkd kills a process to determine the oom_score
levels that lmkd considers during the kill.

Bug: 123024834
Change-Id: I986ae8f2808199b1654bc8d2a32dd88046c79aa3
Signed-off-by: Suren Baghdasaryan <surenb@google.com>