add automatic tone user indications

[linphone] / mediastreamer2

diff --git a/mediastreamer2 b/mediastreamer2
index 28c3383b5e98196ab394f6616f11c195e6759d28..d1d3e1af51ab26ecb9808d6f83629e661c67af5f 160000 (submodule)
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit 28c3383b5e98196ab394f6616f11c195e6759d28
+Subproject commit d1d3e1af51ab26ecb9808d6f83629e661c67af5f