component/bt : improve multi-connection performance and stability

diff --git a/components/bt/lib b/components/bt/lib
index 429496d568d4dd052d9659545dd3f0936d5529ca..0575731e349ca54b46cfc084a752790c1ddcdbba 160000 (submodule)
--- a/components/bt/lib
+++ b/components/bt/lib
@@ -1 +1 @@
-Subproject commit 429496d568d4dd052d9659545dd3f0936d5529ca
+Subproject commit 0575731e349ca54b46cfc084a752790c1ddcdbba