fix(notifications): Prevent notifications text from being truncated

[jamilsaadeh97]

• PR title and description conform to Pull Request guidelines.

Issue #, if available:
Fixes #2857
Fixes part of #4173 in the amplify flutter repo.

Description of changes:
Push notifications content are being truncated when they exceed ~90 characters and can't be shown to the user even if they expand the notification.
I've attached a screenshot on how the notification is currently shown after being expanded when using:
"This is a long push notifications message that's supposed to be completely shown on the user device" as notification body.

Per the official android documentation, I added Notification.BigTextStyle to the builder.

How did you test these changes?
I did not test this because my app is using amplify flutter, so I don't know how to reference this change since amplify-android is a transitive dependency in amplify flutter. Any suggestion would be much appreciated.

Documentation update required?

• No
• Yes (Please include a PR link for the documentation update)

General Checklist

• Added Unit Tests
• Added Integration Tests
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[vincetran]

@jamilsaadeh97 Thanks for your PR! I was able to test this change locally and confirmed with stakeholders that we can pull this in. See the attached screenshots of the new experience:

[jamilsaadeh97]

@vincetran Amazing! Will be waiting for the PR to be fully approved to merge it. Thank you!

[jamilsaadeh97]

Hi @vincetran Do you have any updates for moving forward regarding this PR?

[mattcreaser]

After some quick internal discussions we will move ahead with this PR and open an additional feature request to expose a delegate API for configuring the notification.

We'll update this branch and then will need to have a passing test run, then we can merge!

[jamilsaadeh97]

@mattcreaser It seems that AmplifyAndroid-IntegrationTest is failing but I can't know the reason. If the issue is within the scope of the PR, I'm more than happy to try to fix it.

[mattcreaser]

Hi @jamilsaadeh97 I took a look and the failure wasn't caused by your changes - there are some known transient failures that can occur. I'll rerun the tests.