Add the property context for ro.lmk.use_minfree_levels

This is not settable by vendor init at the moment, which appears to be a mistake
because it is often used as a board-level configuration.

Change-Id: I7a49d55712e9606446b3e6307627a208657d5da2
Test: adb shell getprop -Z | grep lmk
Bug: 184041905
diff --git a/private/property_contexts b/private/property_contexts
index 5d4c3b7..54eb0a4 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -542,6 +542,7 @@
 ro.lmk.thrashing_limit_critical u:object_r:lmkd_config_prop:s0 exact int
 ro.lmk.thrashing_limit_decay    u:object_r:lmkd_config_prop:s0 exact int
 ro.lmk.use_minfree_levels       u:object_r:lmkd_config_prop:s0 exact bool
+ro.lmk.use_new_strategy         u:object_r:lmkd_config_prop:s0 exact bool
 ro.lmk.upgrade_pressure         u:object_r:lmkd_config_prop:s0 exact int
 lmkd.reinit                     u:object_r:lmkd_prop:s0 exact int