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 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).
Comment out unused strings.

Comment out unused strings. Once they're gone, they're hard to get
people to translate, and many of them are very general and possibly
useful again in the future.