Voice note's duration is not persisted.

[tuancoltech]

Problem

Currently we’re not storing a Voice note’s duration to storage.
Meanwhile, we want to show the duration of a recording in the Note list/Recording detail view.

Solution.

There're 2 potential approaches:

• 1. We extract duration information from voice note file whenever we need it.
• 2. Persist Voice's note duration in cache storage of ARK framework.

For MVP, we'll go with 1st approach.
For post MVP, we'll go with 2nd approach when cache storage is ready to be used.