Relax isExprentIndependent

I think the EXPRENT_FIELD condition exists in case the field's
initializer depends on a prior field in the same class.

We already handle this case in the deobfuscator, which ensures fields
appear in exactly the order in which they are first written to in the
<init> and <clinit> methods. (This isn't perfect, as we ignore the
problem of multiple <init> methods writing fields in different orders to
each other, but it seems good enough for the client.)

src/org/jetbrains/java/decompiler/main/InitializerProcessor.java

@@ -241,8 +241,6 @@ public class InitializerProcessor {
             }
           }
           break;
-        case Exprent.EXPRENT_FIELD:
-          return false;
       }
     }