Implement Android RSS/Atom feed parser

- Add FeedParser.kt with automatic feed type detection
- Add RSSParser.kt for RSS 2.0 feeds
- Add AtomParser.kt for Atom 1.0 feeds
- Add comprehensive unit tests for both parsers
- Support iTunes namespace and enclosures
- Fix pre-existing compilation issues in the codebase
- Update build.gradle.kts with proper dependencies and AGP 8.5.0

native-route/android/src/test/java/com/rssuper/models/SearchResultTest.kt

@@ -122,7 +122,7 @@ class SearchResultTest {
         assertEquals("article-1", modified.id)
         assertEquals(SearchResultType.ARTICLE, modified.type)
         assertEquals("Modified Title", modified.title)
-        assertEquals(0.99, modified.score, 0.001)
+        assertEquals(0.99, modified.score!!, 0.001)
     }
 
     @Test