DFA: ignore boolean fields initializer if it's true or false literal

Often it's used as a knob to switch program behavior, so it's reasonable to analyze both alternatives

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/unwrapIfStatement/afterUnreachableElse.java

@@ -1,8 +1,7 @@
 // "Unwrap 'if' statement" "true"
 class X {
-    private final boolean field = true;
-
     String m() {
+        boolean field = true;
         return "one";
     }
 }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/unwrapIfStatement/beforeUnreachableElse.java

@@ -1,8 +1,7 @@
 // "Unwrap 'if' statement" "true"
 class X {
-    private final boolean field = true;
-
     String m() {
+        boolean field = true;
         if (fiel<caret>d) return "one";
         return "two";
     }