Remove sun.nio.fs.UnixChannelFactory from preloaded-classes

The tests use the preloaded classes to create the core image and
that leads to UnixChannelFactory being initialized despite the
fact that FileDescriptor is not. This manifests with a null pointer
crash in tests.

Bug: 80495283
Test: m test-art-host
Change-Id: I785104e6c69c605b16357a9557b203b489972261

config/preloaded-classes

@@ -6375,7 +6375,6 @@ sun.nio.fs.LinuxFileSystemProvider
 sun.nio.fs.NativeBuffer
 sun.nio.fs.NativeBuffer$Deallocator
 sun.nio.fs.NativeBuffers
-sun.nio.fs.UnixChannelFactory
 sun.nio.fs.UnixChannelFactory$Flags
 sun.nio.fs.UnixConstants
 sun.nio.fs.UnixException

config/preloaded-classes-blacklist

@@ -1,3 +1,4 @@
 android.net.ConnectivityThread$Singleton
 android.os.FileObserver
 android.widget.Magnifier
+sun.nio.fs.UnixChannelFactory