field can be local: treat non-primitive fields as read/write (IDEA-52901)

java/java-tests/testData/inspection/fieldCanBeLocal/localStateVar2InnerClass/expected.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<problems/>

java/java-tests/testData/inspection/fieldCanBeLocal/localStateVar2InnerClass/src/Test.java

@@ -0,0 +1,11 @@
+import java.util.*;
+public class Outer {
+  private Map<String, String> value = new HashMap<String, String>();
+
+  public class Inner {
+
+    public Inner(String s) {
+      if (!value.containsKey(s)) value.put(s, "");
+    }
+  }
+}

java/java-tests/testData/inspection/fieldCanBeLocal/stateField/expected.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<problems>
+</problems>

java/java-tests/testData/inspection/fieldCanBeLocal/stateField/src/Test.java

@@ -0,0 +1,8 @@
+import java.util.*;
+public class Test {
+  private final Map<String, String> myModuleToOutput = new HashMap<String, String>();
+
+  void foo() {
+    if (myModuleToOutput.containsKey(null)) myModuleToOutput.put("", "");
+  }
+}