zxtune-android: extract RealBrowserViewModel and EmptyBrowserViewModel to separate sources.
zxtune-android: declare initial scanning functionality and subpathes support.
Extract lite version of core_plugins_archives and core_plugins_containers libraries.
Extract formats_archived_multitrack and formats_packed_decompilers libraries.
zxtune-android: include lite versions of containers (ay,sid) and archives (decompilers).
zxtune-android: support multitrack files.
zxtune-android: compatibility with .xspf files created on desktop version.
zxtune-android: fix in sequence/loop mode storing.
zxtune-android: fix crash while loading playlist from empty path.
zxtune-android: fix crash for expired browser loader.
zxtune-android: increase sound output latency to 80ms- better sound for long time heavy loads.
Fix parsing vtx and transponed ym.