MoveFieldAssignmentToInitializerInspection: allow unknown methods

As this is intention-like part of inspection (no warning), we can allow it even if we are not sure that semantics will be preserved. See comments in IDEA-177602

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/moveFieldAssignmentToInitializer/afterNonGetterMethodCalled.java

@@ -0,0 +1,12 @@
+// "Move assignment to field declaration" "INFORMATION"
+public class Test {
+  String myField = getValue();
+  private String value;
+
+  void f() {
+  }
+
+  public String getValue() {
+    return value+value;
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/moveFieldAssignmentToInitializer/beforeNonGetterMethodCalled.java

@@ -0,0 +1,13 @@
+// "Move assignment to field declaration" "INFORMATION"
+public class Test {
+  String myField;
+  private String value;
+
+  void f() {
+    <caret>myField = getValue();
+  }
+
+  public String getValue() {
+    return value+value;
+  }
+}