Fix default values when no TTL and sentTime is available

[Jeasmine]

Description

One Line Summary

Fix default values when no TTL and sentTime is available

Details

Motivation

HMS Notification with Data Message type is not being displayed because TTL value and Sent Time is coming with 0. Due to TTL check notification is not displayed.
Not rely on getCurrentThreadTimeMillis since it depend on each Thread and is not the same between threads. N

Scope

HMS Notifications

Testing

Unit testing

Add ttl_shouldDisplayNotificationWithNoTTLandSentTime test case

Manual testing

Test notification display with data and message, message type notification, with application in background and swiped away. On Huawei P20 Lite Android 9

Affected code checklist

• Notifications
  • Display
  • Open
  • Push Processing
  • Confirm Deliveries
• Outcomes
• Sessions
• In-App Messaging
• REST API requests
• Public API changes

Checklist

Overview

• I have filled out all REQUIRED sections above
• PR does one thing
  • If it is hard to explain how any codes changes are related to each other then it most likely needs to be more than one PR
• Any Public API changes are explained in the PR details and conform to existing APIs

Testing

• I have included test coverage for these changes, or explained why they are not needed
• All automated tests pass, or I explained why that is not possible
• I have personally tested this on my device, or explained why that is not possible

Final pass

• Code is as readable as possible.
  • Simplify with less code, followed by splitting up code into well named functions and variables, followed by adding comments to the code.
• I have reviewed this PR myself, ensuring it meets each checklist item
  • WIP (Work In Progress) is ok, but explain what is still in progress and what you would like feedback on. Start the PR title with "WIP" to indicate this.

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This change is 

[jkasten2]

Reviewed 8 of 8 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @Jeasmine)