Update ETH icon to use Aurora ETH icon

[srirambv]

Description

Aurora uses ETH symbol for native Token.

Steps to reproduce

1. Upgrade to a build that has Aurora network
2. Native token uses Eth icon rather than native icon

Actual result

Expected result

Use native icons

Issue reproduces how often

Easy

Version/Channel Information:

• Can you reproduce this issue with the current Play Store version? NA
• Can you reproduce this issue with the current Play Store Beta version? Yes
• Can you reproduce this issue with the current Play Store Nightly version? Yes

Device details

• Install type (ARM, x86): ARM
• Device type (Phone, Tablet, Phablet): Phone
• Android version: 12

Brave version

1.42.76

Website problems only

• 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

Additional information

Related desktop issue #24024

[Pavneet-Sing]

This has a dependency on #28561

[Pavneet-Sing]

Note: This outcome will be changed with #29227

[srirambv]

Verification passed on the following devices running 1.51.87 x64 Beta build

• Verified steps from issue description and brave/brave-core#17692
• Verified native asset icon for Aurora is updated to show Aurora Icon.

Oppo Reno 5 (Android 13)	Lenovo Tab (Android 12)
17692-ARM.mp4	17692-Tab.mp4