fix: some devices can not extract any av video (BiliBili)

Author: InfinityLoop1308

extractor/src/main/java/org/schabi/newpipe/extractor/services/bilibili/extractors/BilibiliRelatedInfoItemExtractor.java

@@ -33,7 +33,7 @@ public BilibiliRelatedInfoItemExtractor(final JsonObject json, String id, String
         this.pic = pic;
         this.p = p;
     }
-    public BilibiliRelatedInfoItemExtractor(final JsonObject json){
+    public BilibiliRelatedInfoItemExtractor(final JsonObject json) throws ParsingException {
         item = json;
         type = "related";
         id = item.getString("bvid").equals("")? new utils().av2bv(item.getLong("aid")):item.getString("bvid");

extractor/src/main/java/org/schabi/newpipe/extractor/services/bilibili/utils.java

@@ -1,5 +1,8 @@
 package org.schabi.newpipe.extractor.services.bilibili;
 
+import org.schabi.newpipe.extractor.exceptions.ParsingException;
+
+import java.text.ParseException;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
@@ -22,16 +25,27 @@ public Long bv2av(String bv){
         }
         return (r - add) ^ xor;
     }
-    public String av2bv(Long x){
+    public String av2bv(Long x) throws ParsingException {
+        String result = av2bvImpl(x, false);
+        return result.contains(" ")?av2bvImpl(x, true):result;
+    }
+    /*
+        for unknown reason, some devices resolve the index as index - 1
+        flag is set to true that case
+     */
+    private String av2bvImpl(Long x, boolean flag) throws ParsingException {
         x = (x^xor) + add;
         String[] r = "BV1  4 1 7  ".split("");
         for(int i=0;i<6;i++){
-            r[s[i]] = String.valueOf(table.charAt((int) ((x / Math.pow(58, i)) % 58)));
+            r[s[i] + (flag?1:0)] = String.valueOf(table.charAt((int) ((x / Math.pow(58, i)) % 58)));
         }
         String result = "";
         for(String i: r){
             result += i;
         }
+        if(flag && result.contains(" ")){
+            throw new ParsingException(String.format("Failed to convert av to bv. av number: %s", x));
+        }
         return result;
     }
     public static String getUrl(String url, String id){

extractor/src/main/java/org/schabi/newpipe/extractor/stream/StreamInfo.java

@@ -121,7 +121,8 @@ private static StreamInfo extractImportantData(@Nonnull final StreamExtractor ex
                 || isNullOrEmpty(id)
                 || name == null /* but it can be empty of course */
                 || ageLimit == -1) {
-            throw new ExtractionException("Some important stream information was not given.");
+            throw new ExtractionException(String.format("Some important stream information was not given. " +
+                    "streamType: %s, url: %s, id: %s, name: %s, ageLimit: %d", streamType, url, id, name, ageLimit));
         }
 
         return new StreamInfo(extractor.getServiceId(), url, extractor.getOriginalUrl(),