Smoother animation, notification on layout change and a bug fix

[sslater11]

Smoother Animation
Hi, I have made the animation look smoother by fading it out. Before the animation would draw a box over the key and after it was finished, the box would instantly disappear. I've made both the box and the falling letter fade out at the end of the animation, which makes it look a lot less sharp. To test how smooth it looks, set both animation speeds to 500.
see KeyboardKey.kt for these changes

Layout change notification
I've added a Toast notification for every time the user changes the layout, so it will tell them which layout they are now on.
see ComposeKeyboardView.kt for these change.

Bug fix
The cursor was moving to the wrong place when we had a key that entered a string of text with more than one character.
Fixes issue 216.
see Utils.kt for the bug fix

[dessalines]

Looks good, thanks!

In the future, run ./gradlew formatKotlin to pass lint.

[sslater11]

Okay I can do that!
This is the first time I've worked with Kotlin code, so I'm not that great with it haha. I've been meaning to learn it, but it looks so different. It took me a lot longer than I care to admit to even figure out these tiny commits. The bug fix was easy at least lol.

Also, thank you very much for this app. I've been using "Mulitiling O Keyboard" with my own custom layout which is the same as this, but with a different letter arrangement as I did some analysis and thought I could improve on it. There is a speed limit with Multiling O, and your app allows multi touch which is awesome!

[dessalines]

I did the same... went from MessageEase -> MultiLing-O, and then both got abandoned.

I'm obsessed with typing speed, but I don't see us being able to get much faster without AI designed layouts: #169

[sslater11]

Haha great minds aye! Personally I'm obsessed with the idea of being able to type perfectly without looking at my screen. I like the idea of being able to text and look around, or rudely text whilst someone else is talking to me, and I maintain eye contact lol.

For speed, one improvement I added was to not put any swiping letters on the middle key, because I noticed my thumbs battling it out. Instead I put the letters on the left and right side, and used symbols only in the middle.

Special keys for my layout:
Left side top button - shift key
Left side middle button - select all, copy, paste, cut
Left side bottom - swipe up/down/left/right = moving the cursor a single character. Swipe diagonal top left/right = move cursor by a whole word. Swipe diagonal bottom left right = move cursor to start/end of textbox.

Right side top button - delete
Right side middle button - enter
Right side bottom button - Swipe left/right = undo/redo

I obviously ported my layout to Thumb-Key, although I haven't put a Shift key on it yet lol. I'm struggling to write the letter j and z, because of the bug with the top row #issue #213, so I've been watching that. I also seem to struggle typing 'w' as I think I'm swiping slightly diagonally, but I'll adjust.