custom "welcome" notification text is truncated

[LaurenWags]

Test Plan

Confirmed with @emerick @Miyayes the updated text for this notification should be:

🎉 You’re now earning!
You earn whenever a notification like this appears on your screen. You don’t need to click to earn.

Description

Follow up to #29297

When the custom ad notification flag is enabled for brave://flags/#brave-ads-custom-push-notifications-ads, and the welcome notification is shown (added with #29297), the full text doesn't display.

The full text does display when standard/OS notification is used, not custom notifications.

Steps to Reproduce

1. Clean profile 1.52.x
2. Enable #brave-ads-custom-push-notifications-ads flag via brave://flags
3. Enable rewards and connect to a custodian
4. Confirmed that the custom ad notification is shown, but full text is not displayed.

Actual result:

Custom Notification with truncated text:

Expected result:

Full text to be shown like when using standard/default OS notifications:

Reproduces how often:

easily

Brave version (brave://version info)

Version/Channel Information:

• Can you reproduce this issue with the current release? n/a
• Can you reproduce this issue with the beta channel? yes
• Can you reproduce this issue with the nightly channel? yes

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:

@emerick also noted that the default notification looks cramped. I'd imagine that once we get translations for this, some translations could push this text to be truncated as well.

cc @Miyayes

[kjozwiak]

The above requires 1.52.110 or higher for 1.52.x verification👍

[LaurenWags]

Verified with

Brave | 1.52.110 Chromium: 114.0.5735.35 (Official Build) (x86_64)
-- | --
Revision | 2295354895fa3652ae47b651481831484f16d1ff-refs/branch-heads/5735@{#713}
OS | macOS Version 13.4 (Build 22F66)

Verified updated notification text as per issue description.
Confirmed updated notification text on default (OS) notification and custom notification (both light and dark themes).
Confirmed no text is truncated (English only for now, translations are not in yet).

Default OS Notification	Custom Notification (Dark)	Custom Notification (Light)

[MadhaviSeelam]

Verification PASSED using

Brave | 1.52.110 Chromium: 114.0.5735.35 (Official Build) (64-bit)
-- | --
Revision | 2295354895fa3652ae47b651481831484f16d1ff-refs/branch-heads/5735@{#713}
OS | Windows 11 Version 22H2 (Build 22621.1702)

• Verified updated notification text as per issue description.
• Confirmed updated notification text on default (OS) notification and custom notification (both light and dark themes).
• Confirmed no text is truncated (English only for now, translations are not in yet).

Default OS Notification	Custom Notification (Dark)	Custom Notification (Light)

Note: Default OS notification shows close button where as Custom notifications do not have button but both have same text.

[GeetaSarvadnya]

Verification PASSED on

Brave | 1.52.112 Chromium: 114.0.5735.35 (Official Build) (64-bit)
-- | --
Revision | 2295354895fa3652ae47b651481831484f16d1ff-refs/branch-heads/5735@{#713}
OS | Windows 10 Version 22H2 (Build 19045.2965)

• Verified updated notification text as per issue description.
• Confirmed updated notification text on default (OS) notification and custom notification (both light and dark themes).
• Confirmed no text is truncated (English only for now, translations are not in yet).

Default OS Notification	Custom Notification (Dark)	Custom Notification (Light)

[stephendonner]

Setting as QA Pass-Linux, since I spun off the Linux-only issue in #30605.