Display wallet icon when viewing brave://wallet/swap

[jamesmudgett]

Make sure that the wallet icon is visible in the URL bar when visiting brave://wallet/swap, the interaction with the wallet from the url bar should be similar to that of a DApp. When an order must be confirmed the wallet confirmation panel should be displayed. If a user needs to get to pending transactions that have been dismissed they can do that easily by tapping on the wallet icon (which would also display the pending confirmation notification badge).

[kjozwiak]

The above requires 1.50.120 or higher for 1.50.x verification 👍

[srirambv]

Verification passed on the following devices running 1.50.120 x64 build

• Verified able to visit brave://wallet/swap and is immediately connected to the wallet network
• Verified wallet icon is always shown on visiting brave://wallet/swap
• Verified selecting Swap from token details page or from action button loads a new tab and loads brave://wallet/swap
• Verified if there is already an opened swap page, focus is set to it rather than opening a new tab
• Encountered #29681, #29682, #29811 & #29812

Oppo Reno 5(Android 13)	Lenovo Tab (Android 12)
17947-ARM.mp4	17947-Tab.mp4