Add new low memory kill reason

Add kill reason for a cached app kill when free memory is under low
watermark.

Bug: 306755741
Change-Id: I3c5496d6215ea0f5eb350d83fd558d433a136202
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
diff --git a/services/core/java/com/android/server/am/LmkdStatsReporter.java b/services/core/java/com/android/server/am/LmkdStatsReporter.java
index 4380b42..1e4dd64 100644
--- a/services/core/java/com/android/server/am/LmkdStatsReporter.java
+++ b/services/core/java/com/android/server/am/LmkdStatsReporter.java
@@ -44,6 +44,7 @@
     private static final int DIRECT_RECL_AND_THRASHING = 5;
     private static final int LOW_MEM_AND_SWAP_UTIL = 6;
     private static final int LOW_FILECACHE_AFTER_THRASHING = 7;
+    private static final int LOW_MEM = 8;
 
     /**
      * Processes the LMK_KILL_OCCURRED packet data