Smart completion: don't use outer call's expected type too much

idea/idea-completion/testData/smart/LambdaValue4.kt

@@ -0,0 +1,11 @@
+fun foo(list: List<String?>, list2: List<Int>) {
+    bar(list.map { it?.let { list2.<caret> } })
+}
+
+fun bar(p: Collection<Int?>) {
+}
+
+// EXIST: size
+// EXIST: indexOf
+// ABSENT: isEmpty
+// ABSENT: toString