Bluetooth: TBS: Ensure sending notifications

The existing implemented only attempted to send all notifications,
but if host was out of ATT TX buffers the notifications would fail
and the client may miss out on important information, and would be
a spec violation.

This commit refactors notificatios in TBS so that they are always
sent.

Signed-off-by: Emil Gydesen <[email protected]>

Author: Thalley

subsys/bluetooth/audio/Kconfig.tbs

@@ -52,6 +52,14 @@ config BT_TBS_MAX_SCHEME_LIST_LENGTH
 	help
 	  Sets the maximum length of the URI scheme list.
 
+config BT_TBS_LOCK_TIMEOUT
+	int "Milliseconds of timeout when handling concurrent operations"
+	range 0 1000
+	default 10
+	help
+	  The number of milliseconds that the TBS implementation will maximum wait before rejecting
+	  an write request if another is already in progress in another thread.
+
 endif # BT_TBS