Invalid text error using emojis (UTF-16)

Emojis don't match the lexer.

They should match [`SimpleNameCharacter`](https://github.com/google/smali/blob/27a1717337c413364484df0e12e42df7d4fc9d0a/smali/src/main/jflex/smaliLexer.jflex#L260) but they don't for some reason.
For example 🍉 is `\ud83c\udf49` which corresponds to `HighSurrogate` and `LowSurrogate` respectively.

**Example**

Command: `java -jar smali.jar tokens test.smali`

Input

```smali
invoke-virtual {p0}, Lsample/SampleActivity;->🍉()V
```

Output

```
Error for input '🍉': Invalid text
INVALID_TOKEN("\ud83c\udf49")
```