fix total duration err

Took 47 minutes

m-muse/src/main/java/com/yidianling/muse/utils/MediaPlayerTimeUtil.kt

@@ -28,7 +28,7 @@ class MediaPlayerTimeUtil {
                         "$minute:$second"
                     }
                 }
-            }else if (time<60){
+            }else if (time in 1..59){
                 second = time
                 return if (second in 0..9){
                     "00:0$second"
@@ -36,7 +36,7 @@ class MediaPlayerTimeUtil {
                     "00:$second"
                 }
             }
-            return null
+            return ""
         }
 
         fun formatTimeOff(finishTime:Long):String{