settings: Add scroll for settings page

[MritunjayTiwari14]

Before	After (Screenshot)

Video Recordings

Before

before.mp4

After (Normal)

after.mp4

After (Increased Text Size to unreasonably high in android settings to test edge case)

after_increased_text_size_too_much_in_android_settings_edge_case.mp4

Fixes #1904

[gnprice]

Thanks for taking care of this!

Before we can review this change, it will need a test.

Those screenshots and recordings are very helpful, thanks. One remark: there's nothing unreasonable about the large text size — people vary in how sharp their vision is, and for some people that setting is useful by making it possible to read the text on the screen.