Crypto Wallet dark theme final follow up

[srirambv]

Description

Crypto Wallet dark theme final follow up

Actual result:

H/w Address selection

Token Auto fill selection

Account connection linkage

Expected result:

One fix for three issues and hopefully upstream support for theming

Reproduces how often:

Easy

Brave version (brave://version info)

Component : 0.1.47

Version/Channel Information:

• Can you reproduce this issue with the current release? Yes
• Can you reproduce this issue with the beta channel? Yes
• Can you reproduce this issue with the dev channel? Yes
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? NA
• Does the issue resolve itself when disabling Brave Rewards? NA
• Is the issue reproducible on the latest version of Chrome? NA

Miscellaneous Information:

[srirambv]

Sign contract window doesn't show text in dark theme. Found while testing #8223