[Bandcamp] Fix regression of Opus radio streams extraction

When moving opus-lo into a constant, opus-lo was renamed to opus_lo and was only used if no MP3 stream was available (which was not the case before the changes in BandcampRadioStreamExtractor related to the addition of the support of all delivery methods), so these changes removed the ability to get Opus streams of Bandcamp radios.

This commit reverts this unwanted change.

Author: AudricV

extractor/src/main/java/org/schabi/newpipe/extractor/services/bandcamp/extractors/BandcampRadioStreamExtractor.java

@@ -33,7 +33,7 @@
 
 public class BandcampRadioStreamExtractor extends BandcampStreamExtractor {
 
-    private static final String OPUS_LO = "opus_lo";
+    private static final String OPUS_LO = "opus-lo";
     private static final String MP3_128 = "mp3-128";
     private JsonObject showInfo;
 
@@ -126,7 +126,9 @@ public List<AudioStream> getAudioStreams() {
                     .setMediaFormat(MediaFormat.MP3)
                     .setAverageBitrate(128)
                     .build());
-        } else if (streams.has(OPUS_LO)) {
+        }
+
+        if (streams.has(OPUS_LO)) {
             audioStreams.add(new AudioStream.Builder()
                     .setId(OPUS_LO)
                     .setContent(streams.getString(OPUS_LO), true)