 Version 6.3.6 brings several changes:

* upgraded gradle to 8.9 and Android Gradle Plugin to 8.5.2
* minor dependencies updates
* corrected the count of total episodes in History view
* corrected the count of selections in AllEpisodes, History views
* fixed "add selected to queue" in History, AllEpisodes views
* known issue: in History and AllEpisodes views, the play button on every episode is not convertible
* added history count in NavDrawer
* in adapters, made selectedItems type explicit (rather than of Any), either of Episode or of Feed
* explicitly revoked DB monitoring in episodes list views at exit
* fixed issue of IndexOutOfBoundsException when adding to an empty queue
