Added two snippets for showcasing how to do Masking and Clipping in Compose (#362)

* Code snippet for Compose doc at https://developer.android.com/quick-guides/content/animate-text?hl=en (Animate text character-by-character).

This commit slightly modifies (makes buildable in our repo) the existing code on the current DAC page.

That code, in turn, was BNR's simplified version of Xoogler astamato's Medium article at https://medium.com/androiddevelopers/effective-state-management-for-textfield-in-compose-d6e5b070fbe5

* Code snippet for Compose doc at https://developer.android.com/quick-guides/content/animate-text?hl=en (Animate text character-by-character).

This commit slightly modifies (makes buildable in our repo) the existing code on the current DAC page.

That code, in turn, was BNR's simplified version of Xoogler astamato's Medium article at https://medium.com/androiddevelopers/effective-state-management-for-textfield-in-compose-d6e5b070fbe5

* Apply Spotless

* Fix email input snippet

* Migrate to use BasicSecureTextField.

* Updated to use BasicSecureTextField.

* Added clipping and faded edge examples

* Apply Spotless

* Clean up snippet

* Clean up snippet

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Co-authored-by: dmail <[email protected]>
Co-authored-by: thedmail <[email protected]>
Co-authored-by: riggaroo <[email protected]>

Author: riggaroo