src: config: add bluez5 endpoint files

src/config/04-bluez5-audio-sink.endpoint

+[match-node]
+properties = [
+  { name = "media.class", value = "Audio/Sink" },
+  { name = "device.api", value = "bluez5" },
+]
+
+[endpoint]
+session = "audio"
+type = "si-adapter"
+streams = "audio-sink.streams"
+
+[endpoint.config]
+enable-monitor = true

src/config/04-bluez5-audio-source.endpoint

+[match-node]
+properties = [
+  { name = "media.class", value = "Audio/Source" },
+  { name = "device.api", value = "bluez5" },
+]
+
+[endpoint]
+session = "audio"
+type = "si-adapter"