build: Raise glib dep to 2.46.0
It used to be 2.44.0 in configure.ac, and the code does use at least g_strv_contains, which is new in 2.44. It now also uses g_async_queue_push_front_unlocked and g_settings_schema_list_keys, which are new in 2.46.
Edited by Mart Raudsepp