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• The PR title follows our guidelines: https://github.com/NativeScript/NativeScript/blob/master/tools/notes/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.
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• Tests for the changes are included - https://github.com/NativeScript/NativeScript/blob/master/tools/notes/WritingUnitTests.md.

What is the current behavior?

This is the second attempt after #11217.
Apparently, entering tab item loaded lifecycle during adapter attach is too early and tab frame fragments don't get enough time to be added to the correct fragment manager.

What is the new behavior?

This PR takes a few things from ui-material tabs plugin:

• Uses the fragment onCreateView/onDestroyView fragment lifecycles to ensure view loaded lifecycle is called at the right time (see line, commit)
• Safety checks for opening/closing modals that contain a tab view

It seems we don't really need the material plugin approach for retrieving child fragment manager since adapter always adds/attaches fragments to tabView._getFragmentManager(), so this PR uses the fragment tag to resolve the tab fragment directly and consequently the child fragment manager here.

Fixes #10165.