make entering class literals in method calls easier during smart completion (IDEA-162394)

sort class literals by class proximity
process closest (imported) inheritors first

java/java-tests/testData/codeInsight/completion/smartType/ConsiderClassProximityForClassLiterals.java

@@ -0,0 +1,11 @@
+class X {
+
+  <T> void foo(Class<T> c) {
+
+  }
+
+  {
+    foo(Str<caret>)
+  }
+
+}