Fix text scaling in web-view

[Svechnikov]

Telegram enforces the normal scale type in the app itself but not in web-view. This might lead to unexpected results in all web apps in general, but it's especially noticeable in Flutter web-apps.

Below you can see examples with an app from the official Flutter gallery. They were captured on an emulator (Pixel 3A API 34 extension level 7 x86_64) but we also reproduced the issue on physical devices (Samsung S23 Ultra, Google Pixel 7A API 33).

In order to fix this, we can use WebSettings.LayoutAlgorithm.TEXT_AUTOSIZING. This shouldn't affect/break anything else.

System text size	Before	After