lmkd: Add command to get number of kills

Intrduce LMK_GETKILLCNT command for ActivityManager to get the number of
kills from lmkd.

Bug: 117126077
Test: used lmkd_unit_test to verify correct reporting
Change-Id: I09c720a7176b4df95efc544177cd2694f8d791be
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2 files changed