ANDROID: softlockup: add vendor hook for a softlockup task

Add hook to gather data of softlockup and summarize it with
other information.

It helps the bootloader produce the summary information when
kernel panic or watchdog reset occurs. It can be obtained through
Ramdump, etc., and this information can be used to quickly classify
and respond to problems.

Bug: 326888644

Signed-off-by: Sangmoon Kim <sangmoon.kim@samsung.com>
Change-Id: I5263bbd573c3fa4b4c981ac26c943721ce09506d
(cherry picked from commit 8635a091)