Move FormatManager back to the media_kit

* We don't aim to replicate this functionality. I don't
think this will be useful at all in future iterations.
Originally I planned to rewrite it on top of the new
BMediaFormat, but now I am of the hopinion this is
greatly unneeded.

src/kits/codec/Jamfile

@@ -36,11 +36,11 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 			# Internal Functionality
 			ChunkCache.cpp
 			AddOnManager.cpp
-			FormatManager.cpp
 			PluginManager.cpp
 
 			# We need this to do not depend on libmedia
 			# will be removed when libmedia2 is introduced
+			FormatManager.cpp
 			MediaDefs.cpp
 			MediaFormats.cpp
 			RealtimeAlloc.cpp

src/kits/media/Jamfile

@@ -60,6 +60,7 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 			DataExchange.cpp
 			DefaultMediaTheme.cpp
 			DormantNodeManager.cpp
+			FormatManager.cpp
 			MediaRecorderNode.cpp
 			Notifications.cpp
 			request_data.cpp