Bug: Dark mode not respected in WebView

[anikiki]

Task/Issue URL: https://app.asana.com/0/414730916066338/1204003071445738/f

Description

Updated to use the DayNight base theme. Increased webkit version. Added android:isLightTheme with appropriate values in both light and dark themes.

Fixes #2878

Steps to test this PR

Check the issue

• Install from develop on a device with OS version 11+
• Switch the theme to "Dark" / "System Default" (in this case make sure your phone had Dark mode ON) from Settings
• Search for something (e.g cats)
• Notice the search results page is light

Check the fix

• Install from develop on a device with OS version 11+
• Switch the theme to "Dark" / "System Default" (in this case make sure your phone had Dark mode ON) from Settings
• Search for something (e.g cats)
• Notice the search results page is dark

NO UI changes

[malmstein]

This looks great, thanks for taking care of it.