Simplified view not appearing on the first page load - Follow up to #42087

[kjozwiak]

Description

As a follow up to #42087, the Simplified view prompt isn't being displayed on the initial page load. Users will need to load a compatible page and then refresh it to see the prompt. At that point, the user can go into ``simplified view`.

Steps to reproduce

Basically the same STR/Cases outlined via #42087 (comment).

1. enable Simplified view for webpages via Hamburger Menu -> Settings -> Accessibility
2. once enabled, load cnn.com and open any articles
3. notice that you won't see a Simplified view prompt
4. refresh the same page once again and the Simplified view prompt will be disaplyed

Actual result

1000002318.mp4

Expected result

Users should be see the Simplified view prompt as soon as they load a compatible webpage rather than requiring a refresh to see the prompt/access simplified view mode.

Reproduces how often

Easily reproduced

Brave version

Brave | 1.75.4 Chromium: 131.0.6778.39 (Official Build) canary (64-bit)
--- | ---
Revision | 26b16ff324dee28788c8470ac458b2a31d27b0b7
OS | Android 15; Build/AP41.240925.009; 35; REL

Device

• Brand/model: Pixel 6
• Android version: Android 15

Channel information

• release (stable)
• beta
• nightly

Reproducibility

• with Brave Shields disabled
• with Brave Rewards disabled
• in the latest version of Chrome

Miscellaneous information

The above will also be in release/stable once #42087 (comment) hits via 1.73.x.