EmojiEditText: Support copy/paste/cut

[Khaos116]

• Version of the library:com.vanniktech:emoji-google-compat:0.18.0-SNAPSHOT
• Affected devices:Android Simulator https://www.yeshen.com/
• Affected versions:Anroid 9.0

使用替换emoji时，EmojiEditText会出现没有替换的情况
When using replacement emoji, EmojiEditText will not be replaced.

1.mp4

[Khaos116]

覆盖粘贴后表情不变的问题是没有走到判断方法内部
The problem that the expression remains unchanged after overwriting and pasting is that the judgment method has not been reached.

[Khaos116]

当覆盖粘贴后，执行删除，会把多个emoji表情进行删除
When overwriting and pasting, executing deletion will delete multiple emoji expressions.

1.mp4

[vanniktech]

Have you tried the sample app?

[vanniktech]

So the problem is that EmojiEditText does not support for instance:

1. copy a single emoji
2. select a single emoji inside the EmojiEditText
3. try to replace that selected Emoji with the copied emoji from step 1

Actual behavior: Nothing
Expected behavior: The emoji gets correctly replaced

[Khaos116]

Your description is correct