AddUsesPermission() allows multiple identical permissions when called twice

Reproduction steps:
1. Open the attached project "ReproProj"
2. Open the “/Assets/Scenes/SampleScene.unity” Scene
3. Open the Build Settings window (File > Build Settings)
4. Click Export
5. Create and select “GradleBuild” folder
6. Open the AndroidManifest.xml (GradleBuild\unityLibrary\src\main\AndroidManifest.xml)
7. Search for the uses-permission elements named "lolkekcheburek"

Expected result: Only one uses-permission element named "lolkekcheburek" is present
Actual result: Two uses-permission elements are named “lolkekcheburek“

Reproducible with: 2023.1.17f1, 2023.2.0b14, 2023.3.0a10
Could not test with: 2021.3.31f1, 2022.3.11f1 (Assets\Scripts\Editor\ManifestExtensions.cs(2,28): error CS0234: The type or namespace name 'Manifest' does not exist in the namespace 'Unity.Android.Gradle')

Reproducible on: Windows 10 Enterprise 21H2
Not reproducible on: No other environment tested

Note:

• The issue does not reproduce when using the AddUniqueUsesPermission()