[java-highlighting] IDEA-363617 Support JEP 494: Module Import Declarations (Second Preview)

- support shadowing module imports by package-on-demand

GitOrigin-RevId: 643fc10bcbfee2f1d41ec02e624b30bc3a48e4bb

java/java-tests/testData/importModule/resolve/ModuleImportWithDefaultPackageImport.java

@@ -0,0 +1,5 @@
+import module my.source.moduleB;
+
+class ModuleImportWithDefaultPackageImport {
+  String<caret> a;
+}