Tweak portfolio UI and add option to show hidden NFTs

[simoarpe]

Description

Tweak UI

• Remove bounce effect from bottom navigation view
• Remove indicator from bottom navigation view
• Change color for selected section in bottom navigation view
• Increase top padding of chip tab layout at the top
• Modify background color of chip tab layout into darker gray (check Figma)

Hidden NFTs

Add an option in the action bar to show/hide hidden NFTs in the NFT section

[srirambv]

Currently blocked on #33255

[srirambv]

Verification passed on Oppo Reno 5 with Android 13 running 1.59.115 x64 build

• Verified steps from brave/brave-core#19990
• Verified no bounce effect is shown on navigation
• Verified bottom navigation is now shown in single colour
• Verified able to show/hide NFTs
• Additional verification here