disable add single static import when on demand exists (IDEA-62321)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addOnDemandStaticImport/beforeSingleImportDisabledWhenOnDemandExists.java

@@ -0,0 +1,17 @@
+// "Add static import for 'test.Bar.f'" "false"
+package test;
+
+import static test.Bar.*;
+
+class Bar {
+    public static final void f() {}
+}
+public class Foo extends FooSuper{
+    {
+        Bar.<caret>f();
+    }
+}
+
+class FooSuper {
+  public static final void f(int i) {}
+}