Music player reads mpris:length instead of xesam:length

apps/music-player/src/main.rs

@@ -41,7 +41,7 @@ impl<'a> From<MetadataMap<'a>> for Metadata {
                 .get("xesam:trackNumber")
                 .and_then(|v| TryFrom::try_from(v).ok()),
             length: map
-                .get("xesam:length")
+                .get("mpris:length")
                 .and_then(|v| i64::try_from(v).ok())
                 .map(|us| us as f32 / 1_000_000.0), // 1,000,000 microseconds in a second
         };