PR Checklist

• 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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• All existing tests are passing: https://github.com/NativeScript/NativeScript/blob/master/tools/notes/DevelopmentWorkflow.md#running-unit-tests-application.
• Tests for the changes are included - https://github.com/NativeScript/NativeScript/blob/master/tools/notes/WritingUnitTests.md.

What is the current behavior?

For Android text is split on " " (space) to get an array of words, then each word is lower-cased, then the first character of each word is changed to upper-case. iOS also splits on special characters like hyphen (-).
For example -
Input: "this is kind-Of-Magic - or a bUG?"
Android output: "This Is Kind-of-magic - Or A Bug?"
iOS output: "This Is Kind-Of-Magic - Or A Bug?"

What is the new behavior?

Any non-whitespace character that is preceded by the start of the string, whitespace, or any of these characters (-"'([{), gets replaced with its uppercase variant.
This is now consistent with iOS. Output for the same example
"this is kind-Of-Magic - or a bUG?" is now
"This Is Kind-Of-Magic - Or A Bug?" for both Android and iOS

Fixes/Implements/Closes #7059.

BREAKING CHANGES:
Output for text-transform: capitalize might differ for android.