An MIT notice is identified as `mit AND mpl-2.0`

### Description

An MIT notice is identified as `MIT AND MPL-2.0`:

```xml

...
```

### How To Reproduce

```
$ wget https://raw.githubusercontent.com/dotnet/wpf/fb28902a8f38ec80274c8120ba832feec97303c4/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Styles/MenuItem.xaml
$ scancode --json-pp - --license --unknown-licenses --license-references MenuItem.xaml
Setup plugins...
Collect file inventory...
Scan files for: licenses with 1 process(es)...
[####################] 2
{
"headers": [
{
"tool_name": "scancode-toolkit",
"tool_version": "32.1.0",
"options": {
"input": [
"MenuItem.xaml"
],
"--json-pp": "-",
"--license": true,
"--license-references": true,
"--unknown-licenses": true
},
...
"files": [
{
"path": "MenuItem.xaml",
"type": "file",
"detected_license_expression": "mit AND mpl-2.0",
"detected_license_expression_spdx": "MIT AND MPL-2.0",
"license_detections": [
{
"license_expression": "mit AND mpl-2.0",
"license_expression_spdx": "MIT AND MPL-2.0",
"matches": [
...
{
"license_expression": "mpl-2.0",
"spdx_license_expression": "MPL-2.0",
"from_file": "MenuItem.xaml",
"start_line": 2,
"end_line": 3,
"matcher": "3-seq",
"score": 34.21,
"matched_length": 13,
"match_coverage": 34.21,
"rule_relevance": 100,
"rule_identifier": "mpl-2.0_138.RULE",
"rule_url": "https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/rules/mpl-2.0_138.RULE"
},
...

```

### System configuration

* What OS are you running on? Linux
* What version of scancode-toolkit was used to generate the scan file? 32.1.0
* What installation method was used to install/run scancode? Pip