inference for non-poly expressions: isAssignable already contains loose context inside, don't allow any additional conversions (IDEA-152694)

java/java-tests/testSrc/com/intellij/codeInsight/daemon/lambda/GenericsHighlighting8Test.java

@@ -978,4 +978,8 @@ public class GenericsHighlighting8Test extends LightDaemonAnalyzerTestCase {
   public void testIDEA152179() throws Exception {
     doTest();
   }
+
+  public void testLooseInvocationContextForProperPrimitiveTypes() throws Exception {
+    doTest();
+  }
 }