Add SoundCloud service (#15)

Add SoundCloud service

services/soundcloud/SoundcloudChannelInfoItemExtractor.java

@@ -0,0 +1,42 @@
+package org.schabi.newpipe.extractor.services.soundcloud;
+
+import org.json.JSONObject;
+import org.schabi.newpipe.extractor.channel.ChannelInfoItemExtractor;
+
+public class SoundcloudChannelInfoItemExtractor implements ChannelInfoItemExtractor {
+    private JSONObject searchResult;
+
+    public SoundcloudChannelInfoItemExtractor(JSONObject searchResult) {
+        this.searchResult = searchResult;
+    }
+
+    @Override
+    public String getThumbnailUrl() {
+        return searchResult.getString("avatar_url");
+    }
+
+    @Override
+    public String getChannelName() {
+        return searchResult.getString("username");
+    }
+
+    @Override
+    public String getWebPageUrl() {
+        return searchResult.getString("permalink_url");
+    }
+
+    @Override
+    public long getSubscriberCount() {
+        return searchResult.getLong("followers_count");
+    }
+
+    @Override
+    public long getViewCount() {
+        return searchResult.getLong("track_count");
+    }
+
+    @Override
+    public String getDescription() {
+        return searchResult.getString("description");
+    }
+}