smp: Use SMP_TRACE_WARNING

Bug: 174886838
Test: pair an LE device
Tag: #security
Change-Id: I3c7e0b1dd877dfa29fa0812c6a5e65fcb1d70ea7
(cherry picked from commit 45678238713ba15cca8dd453b992caedf1d43ec5)
diff --git a/stack/smp/smp_act.cc b/stack/smp/smp_act.cc
index fc5098d..ba7cbce 100644
--- a/stack/smp/smp_act.cc
+++ b/stack/smp/smp_act.cc
@@ -692,7 +692,7 @@
   if (!memcmp(p_cb->peer_publ_key.x, p_cb->loc_publ_key.x, BT_OCTET32_LEN) &&
       !memcmp(p_cb->peer_publ_key.y, p_cb->loc_publ_key.y, BT_OCTET32_LEN)) {
     android_errorWriteLog(0x534e4554, "174886838");
-    LOG_WARN("Remote and local public keys can't match");
+    SMP_TRACE_WARNING("Remote and local public keys can't match");
     tSMP_INT_DATA smp;
     smp.status = SMP_PAIR_AUTH_FAIL;
     smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &smp);