automatically focus typing box in the reviewer

[sanjaysargam]

Purpose / Description

automatically focus typing box in the reviewer

Fixes

• Fixes #15569

Approach

requestFocus() on WebView

How Has This Been Tested?

Physical Device ( Realme 9 )

https://github.com/ankidroid/Anki-Android/assets/65113071/b52cc7a8-4090-41e3-b52c-a4cd4c881ca0

Checklist

Please, go through these checks before submitting the PR.

• [x] You have a descriptive commit message with a short title (first line, max 50 chars).
• [ ] You have commented your code, particularly in hard-to-understand areas
• [x] You have performed a self-review of your own code
• [x] UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• [ ] UI Changes: You have tested your change using the Google Accessibility Scanner