Correct handling of explicit variable type

idea/testData/intentions/loopToCallChain/toCollection/explicitValType.kt

@@ -0,0 +1,11 @@
+// WITH_RUNTIME
+// INTENTION_TEXT: "Replace with '+='"
+// IS_APPLICABLE_2: false
+import java.util.ArrayList
+
+fun foo(map: Map<Int, String>) {
+    val result: ArrayList<String> = ArrayList()
+    <caret>for (s in map.values) {
+        result.add(s)
+    }
+}

idea/testData/intentions/loopToCallChain/toCollection/explicitValType.kt.after

@@ -0,0 +1,9 @@
+// WITH_RUNTIME
+// INTENTION_TEXT: "Replace with '+='"
+// IS_APPLICABLE_2: false
+import java.util.ArrayList
+
+fun foo(map: Map<Int, String>) {
+    val result: ArrayList<String> = ArrayList()
+    result += map.values
+}