llkd: add live-lock daemon

Introduce a standalone live-lock daemon (llkd), to catch kernel
or native user space deadlocks and take mitigating actions.

Test: llkd_unit_test
Bug: 33808187
Bug: 72838192
Change-Id: If869ecd06e5ce7b04bba1dafd0a77971b71aa517
diff --git a/private/compat/26.0/26.0.ignore.cil b/private/compat/26.0/26.0.ignore.cil
index 8b9415a..b0b5f19 100644
--- a/private/compat/26.0/26.0.ignore.cil
+++ b/private/compat/26.0/26.0.ignore.cil
@@ -62,6 +62,9 @@
     incident_helper
     incident_helper_exec
     kmsg_debug_device
+    llkd
+    llkd_exec
+    llkd_tmpfs
     last_boot_reason_prop
     mediaprovider_tmpfs
     netd_stable_secret_prop