property_contexts: Add ro.lmk.filecache_min_kb property context

ro.lmk.filecache_min_kb property allows vendors to specify min filecache
size in KB that should be reached after thrashing is detected.

Bug: 193293513
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I927f4a1c81db3f284353fe4ab93bf454acff69b7
diff --git a/private/property_contexts b/private/property_contexts
index 8741fbe..fa5389d 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -516,6 +516,7 @@
 ro.lmk.critical_upgrade         u:object_r:lmkd_config_prop:s0 exact bool
 ro.lmk.debug                    u:object_r:lmkd_config_prop:s0 exact bool
 ro.lmk.downgrade_pressure       u:object_r:lmkd_config_prop:s0 exact int
+ro.lmk.filecache_min_kb         u:object_r:lmkd_config_prop:s0 exact int
 ro.lmk.kill_heaviest_task       u:object_r:lmkd_config_prop:s0 exact bool
 ro.lmk.kill_timeout_ms          u:object_r:lmkd_config_prop:s0 exact int
 ro.lmk.log_stats                u:object_r:lmkd_config_prop:s0 exact bool