feat(android): add options to set notifications channel id, ringtone enabled and auto clear

[mukaschultze]

PR Checklist

• The PR title follows our guidelines: https://github.com/NativeScript/NativeScript/blob/master/CONTRIBUTING.md#commit-messages.
• There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
• All existing tests are passing
• Tests for the changes are included

What is the current behavior?

Currently, there is no way of changing some options of upload notifications that are available on android upload service.

What is the new behavior?

Three new fields were implemented to allow changing these settings, androidRingToneEnabled androidNotificationChannelID and androidAutoClearNotification

The changes made were based off on #71

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[mukaschultze]

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[romulowspp]

Nice job! :D

[VladimirAmiorkov]

Hi @mukaschultze ,

Thank you for this PR. I reviewed and tested it and it works as expected. The only thing that I noticed is that if both androidRingToneEnabled and androidAutoClearNotification are set to true there will be no ringtone. This looks to be an expected behavior since the notification is automatically removed but I would suggest to add this as a note to the API reference in the README.

Can you make this small update, after that I would be happy to merge and release a new version with this new feature.

[mukaschultze]

@VladimirAmiorkov notes added