Add XML documentation for Javax.Microedition.Khronos.Opengles

The `Javax.Microedition.Khronos.Opengles` namespace contains **1,923** `To be added` placeholders in source XML documentation (excluding `docs\xml\index.xml`).

```powershell
rg -n -i --glob 'Javax.Microedition.Khronos.Opengles/**' --glob 'ns-Javax.Microedition.Khronos.Opengles.xml' 'to be added' docs\xml
```

## Update log

- 2026-09-10: Refreshed the placeholder scan from **1,939** to **1,923** (reduced by **16**). Related documentation PRs: [#416](https://github.com/dotnet/android-api-docs/pull/416), [#553](https://github.com/dotnet/android-api-docs/pull/553), [#644](https://github.com/dotnet/android-api-docs/pull/644).

Start with the XML files under docs\xml\Javax.Microedition.Khronos.Opengles and the ns-Javax.Microedition.Khronos.Opengles.xml file identified by the ripgrep command. Review the existing documentation patterns, replace the 1,923 `To be added` placeholders with API documentation, and rerun the scan to confirm none remain outside docs\xml\index.xml.

Written by the indexing model from the issue text.