fix(Instagram - Limit feed to followed profiles): Preserve favorites feed (#5963)

Author: brosssh

extensions/instagram/src/main/java/app/revanced/extension/instagram/feed/LimitFeedToFollowedProfiles.java

@@ -10,9 +10,17 @@ public class LimitFeedToFollowedProfiles {
      * Injection point.
      */
     public static Map<String, String> setFollowingHeader(Map<String, String> requestHeaderMap) {
+        String paginationHeaderName = "pagination_source";
+
+        // Patch the header only if it's trying to fetch the default feed
+        String currentHeader = requestHeaderMap.get(paginationHeaderName);
+        if (currentHeader != null && !currentHeader.equals("feed_recs")) {
+            return requestHeaderMap;
+        }
+
         // Create new map as original is unmodifiable.
         Map<String, String> patchedRequestHeaderMap = new HashMap<>(requestHeaderMap);
-        patchedRequestHeaderMap.put("pagination_source", "following");
+        patchedRequestHeaderMap.put(paginationHeaderName, "following");
         return patchedRequestHeaderMap;
     }
 }