core: fix field search with obfuscated names

jadx-core/src/main/java/jadx/core/dex/info/FieldInfo.java

@@ -25,10 +25,6 @@ public class FieldInfo {
 				dex.getType(field.getTypeIndex()));
 	}
 
-	public static String getNameById(DexNode dex, int ind) {
-		return dex.getString(dex.getFieldId(ind).getNameIndex());
-	}
-
 	public String getName() {
 		return name;
 	}
@@ -50,16 +46,9 @@ public class FieldInfo {
 			return false;
 		}
 		FieldInfo fieldInfo = (FieldInfo) o;
-		if (!name.equals(fieldInfo.name)) {
-			return false;
-		}
-		if (!type.equals(fieldInfo.type)) {
-			return false;
-		}
-		if (!declClass.equals(fieldInfo.declClass)) {
-			return false;
-		}
-		return true;
+		return name.equals(fieldInfo.name)
+				&& type.equals(fieldInfo.type)
+				&& declClass.equals(fieldInfo.declClass);
 	}
 
 	@Override

jadx-core/src/main/java/jadx/core/dex/nodes/ClassNode.java

@@ -28,6 +28,7 @@ import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 
+import org.jetbrains.annotations.TestOnly;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -317,19 +318,19 @@ public class ClassNode extends LineAttrNode implements ILoadable {
 	}
 
 	public FieldNode searchFieldById(int id) {
-		String name = FieldInfo.getNameById(dex, id);
+		return searchField(FieldInfo.fromDex(dex, id));
+	}
+
+	public FieldNode searchField(FieldInfo field) {
 		for (FieldNode f : fields) {
-			if (f.getName().equals(name)) {
+			if (f.getFieldInfo().equals(field)) {
 				return f;
 			}
 		}
 		return null;
 	}
 
-	public FieldNode searchField(FieldInfo field) {
-		return searchFieldByName(field.getName());
-	}
-
+	@TestOnly
 	public FieldNode searchFieldByName(String name) {
 		for (FieldNode f : fields) {
 			if (f.getName().equals(name)) {