[WebGL] texture size error occurs for WebGL on Android 

**Test Env:**
Platform: Android(Pixel 3)

**Actual Result:**
An error occurs for WebGL on Android:
`Requested texture size [4128x4128] greater than WebGL maximum on this browser / GPU [4096x4096]`

**How to Reproduce:**
1. Visit https://intel.github.io/webml-polyfill/examples/style_transfer
2. Select `WebGL`
3. Select one model 
