8248532: Every time I change keyboard language at my MacBook, Java crashes

Reviewed-by: serb, prr

Author: prsadhuk

src/java.desktop/macosx/native/libawt_lwawt/awt/AWTView.m

@@ -1335,7 +1335,7 @@ - (void)setInputMethod:(jobject)inputMethod
 
     NSTextInputContext *curContxt = [NSTextInputContext currentInputContext];
     kbdLayout = curContxt.selectedKeyboardInputSource;
-    [[NSNotificationCenter defaultCenter] addObserver:self
+    [[NSNotificationCenter defaultCenter] addObserver:[AWTView class]
                                            selector:@selector(keyboardInputSourceChanged:)
                                                name:NSTextInputContextKeyboardSelectionDidChangeNotification
                                              object:nil];