Icon and close button isn't aligned within the notification

[srirambv]

Description

Ad notification icon and button are not correctly aligned when custom notification is moved

Steps to Reproduce

1. View ad notification
2. Move the custom notification position
3. Icon and close button isn't aligned within the notification

Actual result:

Expected result:

Reproduces how often:

Easy

Brave version (brave://version info)

Brave	1.67.44 Chromium: 124.0.6367.91 (Official Build) nightly (64-bit)
Revision	ef79e292b7c666e62bda370867616a67b4e21e8f
OS	Windows 11 Version 23H2 (Build 22631.3527)

Version/Channel Information:

• Can you reproduce this issue with the current release? Not sure
• Can you reproduce this issue with the beta channel? Not sure
• 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:

cc: @btlechowski @tmancey @aseren

[btlechowski]

Reproduce on

Brave	1.65.123 Chromium: 124.0.6367.91 (Official Build) (64-bit)
Revision	dd88871b12997b018e3acb2f589713a3ea10338b
OS	Windows 10 Version 22H2 (Build 19045.4291)