[android 5] The default search engine isn't greyed out when removing search engines
Steps to reproduce
- On an Android 5 device, install Focus.
- Go to Settings - Search - three dot menu - select Remove.
- Select a search engine to remove, and observe the other search engine, especially the default one.
Expected behavior
The default search engine is greyed out, and cannot be selected.
Actual behavior
The default search engine is not greyed out.
Device information
- Android device: Samsung Galaxy Tab A6 (Android 5.1.1), Xiaomi mi4i (Android 5.0.2)
- Focus version: RC 94.1.2, Beta 95.0.0-beta.3
- Not reproducible on LEnovo M10 (Android 10), Oppo Find X3 Neo (Android 11), nor Huawei P9 Lite (Android 8).

Reproducible on Beta 95.0.0-beta 5 with Samsung Galaxy Tab A6 (Android 5.1.1).
Reproducible on Beta 96.0.0-beta 1 with Samsung Galaxy Tab A6 (Android 5.1.1).
Reproducible on Beta 97.0.0-beta 1 with Samsung Galaxy Tab A6 (Android 5.1.1).
Reproducible on Beta 98.0.0-beta 1 with Samsung Galaxy Tab A6 (Android 5.1.1).
Reproducible on Beta 99.0.0-beta 1 with Xiomi mi4i (Android 5.0.2).
Reproducible on the latest builds (Nightly 102.0a1 from 5/25, RC 101.1.0, and Beta 101.0.0-beta.6) with Xiaomi mi4i (Android 5.0.2).
This issue still reproduces on the latest Focus Nightly build 104.0a1 from 7/20 with Samsung Galaxy Tab A6 (Android 5.1.1).
The issue is still reproducible on the latest Focus Nightly 107.0a1 from 10/6, and Beta 106.0b4 with Samsung Galaxy Tab A6 (Android 5.1.1).
The issue is still reproducible on the latest Focus Beta 108.0b3 with Xiaomi mi4i (Android 5.0.2).
Moved to bugzilla: https://bugzilla.mozilla.org/show_bug.cgi?id=1802656
Change performed by the Move to Bugzilla add-on.