Restore all submodules except Android (detached as reference)

- Restore swingmusic-desktop submodule
- Restore swingmusic-webclient submodule
- Restore swingmusic_mobile submodule
- Keep Android detached as reference/android-original
- Update .gitmodules to exclude Android submodule
- All platforms now available locally except Android (reference only)

.gitmodules

@@ -1,7 +1,3 @@
-[submodule "swingmusic-android"]
-	path = swingmusic-android
-	url = https://github.com/Dvorinka/swingmusic-extended-android
-	branch = master
 [submodule "swingmusic-desktop"]
 	path = swingmusic-desktop
 	url = https://github.com/Dvorinka/swingmusic-extended-desktop