[Android 13] Restyle Chromium enable notifications dialog

[timchilds]

Summary
CR106 introduced a new dialog to encourage users to enable notifications. This dialog was appearing during and interfering with our onboarding. As a quick fix we moved the dialog outside of the onboarding experience.

We now need to restyle the dialog to be more inline with our styling and call out Brave features that require notifications to function. e.g. rewards and privacy report.

[deeppandya]

@Sam-Sibley can you attach figma spec here ?

[Sam-Sibley]

@deeppandya , Ryan has done the copy. This is good to go.

Here is the link:
https://www.figma.com/file/sdVBBufbl2A11hAgPNfyqG/Android-13-Notifications?node-id=363%3A30672

[kjozwiak]

Verification PASSED on Pixel 6 running Android 13 using the following build(s):

Brave | 1.46.130 Chromium: 108.0.5359.62 (Official Build) (32-bit)
--- | ---
Revision | 041930a89a990cfab0315a2d9f20d6429a4a67cf-refs/branch-heads/5359@{#938}
OS | Android 13; Build/T1B3.221003.008

Went through the STR/Cases outlined via brave/brave-core#15829 (comment) and ensured that the new UI is working as per the following:

• ensured that the Android 13 permission modal appears once the URL bar onboarding has completed
• ensured that tapping on Continue displays the system permission screen without any issues
• ensured that tapping on Not now closes the modal without loading the system permission modal
• ensured that the screen/modal only appears once after the URL onboarding (ensuring it's not seen a second time)

Example	Example

---

Verification PASSED on Samsung Galaxy Tab S8 Ultra running Android 13 using the following build(s):

Brave | 1.46.130 Chromium: 108.0.5359.62 (Official Build) (32-bit)
--- | ---
Revision | 041930a89a990cfab0315a2d9f20d6429a4a67cf-refs/branch-heads/5359@{#938}
OS | Android 13; Build/TP1A.220624.014

Went through the STR/Cases outlined via brave/brave-core#15829 (comment) and ensured that the new UI is working as per the following:

• ensured that the Android 13 permission modal appears once the URL bar onboarding has completed
• ensured that tapping on Continue displays the system permission screen without any issues
• ensured that tapping on Not now closes the modal without loading the system permission modal
• ensured that the screen/modal only appears once after the URL onboarding (ensuring it's not seen a second time)

Example	Example