java smart completion: prefer all items with exactly expected type, not only classes (IDEA-169490)

java/java-tests/testData/codeInsight/completion/smartTypeSorting/PreferGlobalMembersReturningExpectedType.java

@@ -0,0 +1,12 @@
+class Map {
+  static class Builder {}
+  static Builder builder() {} 
+}
+class BiMap extends Map {
+  static class Builder extends Map.Builder {}
+  static Builder builder() {}
+}
+
+class Usage {
+  Map.Builder b = bui<caret>
+}