bridge_builtin_features: add beep via touch variable

Add periodic beep option to one-touch recording by setting
the touch variable TOUCH_MONITOR_BEEP or
TOUCH_MIXMONITOR_BEEP to the desired interval in seconds.

If the interval is less than 5 seconds, a minimum of 5
seconds will be imposed.  If the interval is set to an
invalid value, it will default to 15 seconds.

A new test event PERIODIC_HOOK_ENABLED was added to the
func_periodic_hook hook_on function to indicate when
a hook is started.  This is so we can test that the touch
variable starts the hook as expected.

ASTERISK-30446

Change-Id: I800e494a789ba7a930bbdcd717e89d86040d6661
(cherry picked from commit 1ad52a1263)

funcs/func_periodic_hook.c

@@ -40,6 +40,7 @@
 #include "asterisk/pbx.h"
 #include "asterisk/app.h"
 #include "asterisk/audiohook.h"
+#include "asterisk/test.h"
 #define AST_API_MODULE
 #include "asterisk/beep.h"
 
@@ -343,6 +344,8 @@ static int hook_on(struct ast_channel *chan, const char *data, unsigned int hook
 
 	ast_debug(1, "hook to %s@%s enabled on %s with interval of %u seconds\n",
 			args.exten, args.context, ast_channel_name(chan), interval);
+	ast_test_suite_event_notify("PERIODIC_HOOK_ENABLED", "Exten: %s\r\nChannel: %s\r\nInterval: %u\r\n",
+			args.exten, ast_channel_name(chan), interval);
 
 	return init_hook(chan, args.context, args.exten, interval, hook_id);
 }