OpenGLES3 Error when rendering Cesium Tiles on Quest Devic

Reported from the community [here](https://community.cesium.com/t/opengles3-error-when-rendering-cesium-tiles-on-quest-device/30212),

We started getting this error when we switched to OpenGLES3 from Vulcan. Google seems to point to single pass/double pass issues with the shader.

```AndroidPlayer "Oculus_Quest Pro@ADB:230YC01DB200SQ:0" Assertion failed: OPENGL NATIVE PLUG-IN ERROR: GL_INVALID_OPERATION: Operation illegal in current state```

You can easily reproduce this in the sample cesium projects if you run them on Quest. The errors only appear when a cesium tile is rendering on Android.

We believe the shader is Cesium_RoundPolygonMask

If we put that in the scene on something unrelated to cesium tiles it doesn’t throw the error. So we assume its a specific pass being used within that shader.

Reproduce the error in the sample Cesium projects on an Oculus Quest using Android and OpenGLES3, with a Cesium tile rendering. Then inspect the Cesium_RoundPolygonMask shader and the pass used for Cesium tiles; done means no GL_INVALID_OPERATION occurs during tile rendering.

Written by the indexing model from the issue text.