They don't mean anything sinister.
Phones have a lot of processes running in the background that make the phone work, in addition to the apps you see in Play Store or your app drawer. And every app, whether one of these system processes or an app you install yourself, has not just the name you might see in the app drawer but the actual name of the application package, which you can see if you look in a system log or similar. And that's what you are seeing here: the package names for some completely innocuous but essential apps that make up parts of the phone's software.
So what are they?
* lge.launcher3: I assume the phone is an LG, since LGE = LG Electronics. The "launcher" is the app that provides your home screens and app drawer: every Android phone has one. So this is just the system app that manages the home screens (in this case LG's launcher, as opposed to Google's or Samsung's or whoever else's).
* android.incallui: The fact that it starts "android" suggests a part of the operating system. If we break down "incallui" we get "in call UI", i.e. the In-Call User Interface. So this is the app that provides the screen you see when you are in a call, with the name/number/photo of the other person and a few buttons to select speakerphone, bring up the keypad or end the call.
* android.mms: "MMS" = Multimedia Message Service, i.e. picture messages.
* lge.lickscreensettings: do you perhaps mean "lockscreensettings"? That would then be the app that manages, you guessed it, the lock screen settings. The fact that it starts "lge" also tells you that this is one of the manufacturer's system apps rather than something the user has installed.
Hope that helps. It's important to remember that there are a lot of things going on in the background of a phone (which is really a small computer after all), and almost nobody would recognise all of them. Hence if you see something you don't recognise it's best not to jump to conclusions, because usually it's something completely normal. You would be amazed how many people have posted here worried that they have a "virus" because they spotted the "incallui" process, when all that actually means is that they've made a phone call!
