Remove needStoppedNotification and notification build onDestroy().

This appears to be debugging code and would never be called.
Remove color streaming notification for icon on unsupported APIs.
Remove all code targeting old APIs

Note: Some code referenced Build.VERSION.SDK_INT > 14 which probably should
have been Build.VERSION.SDK_INT >= 14 due to nothing of significance happening
between API 14 & 15.
Remove all lint.xml entries, insert server_discovery.xml

All lint suppressions appear to be invalid now, insert server_discovery for
later use.
A string resource exists for OK, use it.
Remove unused colors.
Remove no longer used playlist_save layout.

This got turned into a more modern fragment.
Remove unused mpd_browsermenu.
Add contentDescription to all ImageViews.

Add contentDescription to all ImageViews which is used primarily for
accessibility.
Remove unused resources (layout).
Remove unused resources (drawable).