Report latest RSS for LMKD kills

Adjust LMK_PROCKILL message to receive the victim's RSS at the time of
the kill. Update ApplicationExitInfo, of the related LMKD victim, and
set the latest RSS data.

Test: Verify LMKD reported kill is reported with latest RSS to telemetry
Test: atest ApplicationExitInfoTest -c
Flag: NA
Bug: 322549716
Change-Id: I7e6cd0368013815ddc298ea2bb2a5afd584654d7
Signed-off-by: Carlos Galo <carlosgalo@google.com>