Add support for signing transactions with Trezor accounts

[spylogsster]

Description

Steps to Reproduce

1. Import Trezor accounts
2. Send money to Trezor accounts
3. Send money from Trezor accounts

Actual result:

Transaction failed

Expected result:

Transaction successs

Reproduces how often:

Brave version (brave://version info)

Version/Channel Information:

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

Other Additional Information:

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

Miscellaneous Information:

[srirambv]

Brave	1.32.103 Chromium: 96.0.4664.45 (Official Build) (64-bit)
Revision	76e4c1bb2ab4671b8beba3444e61c0f17584b2fc-refs/branch-heads/4664@{#947}
OS	☑️ Linux	☑️ Windows 11 Version 21H2 (Build 22000.318)	☑️ macOS Version 11.5.2 (Build 20G95)
Verified test plan from brave/brave-core#10902 Verified able to sign transaction via Trezor wallet
	Linux.Trezor.mp4	Windows.Trezor.mp4	macOS.Trezor.mov