lmkd: move to foreground cpuset before killing

Test: Build and boot
Bug: 199797672
Signed-off-by: Wei Wang <wvw@google.com>
Change-Id: Id475625e0d892fb7111a2cf054d1b57d17003d5a
diff --git a/lmkd.cpp b/lmkd.cpp
index ca64950..6b15943 100644
--- a/lmkd.cpp
+++ b/lmkd.cpp
@@ -2208,7 +2208,7 @@
         goto out;
     }
 
-    set_process_group_and_prio(pid, {"CPUSET_SP_BACKGROUND", "SCHED_SP_FOREGROUND"},
+    set_process_group_and_prio(pid, {"CPUSET_SP_FOREGROUND", "SCHED_SP_FOREGROUND"},
                                ANDROID_PRIORITY_HIGHEST);
 
     last_kill_tm = *tm;