fix: use nice name for 'package-private' in modifiers change message

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

@@ -3,6 +3,7 @@ package jadx.core.dex.info;
 import com.android.dx.rop.code.AccessFlags;
 
 import jadx.core.Consts;
+import jadx.core.utils.exceptions.JadxRuntimeException;
 
 public class AccessInfo {
 
@@ -63,6 +64,10 @@ public class AccessInfo {
 		return (accFlags & AccessFlags.ACC_PRIVATE) != 0;
 	}
 
+	public boolean isPackagePrivate() {
+		return (accFlags & VISIBILITY_FLAGS) == 0;
+	}
+
 	public boolean isAbstract() {
 		return (accFlags & AccessFlags.ACC_ABSTRACT) != 0;
 	}
@@ -188,6 +193,22 @@ public class AccessInfo {
 		return code.toString();
 	}
 
+	public String visibilityName() {
+		if (isPackagePrivate()) {
+			return "package-private";
+		}
+		if (isPublic()) {
+			return "public";
+		}
+		if (isPrivate()) {
+			return "private";
+		}
+		if (isProtected()) {
+			return "protected";
+		}
+		throw new JadxRuntimeException("Unknown visibility flags: " + getVisibility());
+	}
+
 	public String rawString() {
 		switch (type) {
 			case CLASS:

jadx-core/src/main/java/jadx/core/dex/visitors/FixAccessModifiers.java

@@ -38,7 +38,7 @@ public class FixAccessModifiers extends AbstractVisitor {
 		AccessInfo newAccFlags = accessFlags.changeVisibility(newVisFlag);
 		if (newAccFlags != accessFlags) {
 			node.setAccessFlags(newAccFlags);
-			node.addAttr(AType.COMMENTS, "access modifiers changed from: " + accessFlags.getVisibility().rawString());
+			node.addAttr(AType.COMMENTS, "access modifiers changed from: " + accessFlags.visibilityName());
 		}
 	}