Update AudioViewModel.kt

[vaibhavmehrotraa]

Explanation

Essential Checklist

• The PR title and explanation each start with "Fix #bugnum: " (If this PR fixes part of an issue, prefix the title with "Fix part of #bugnum: ...".)
• Any changes to scripts/assets files have their rationale included in the PR explanation.
• The PR follows the style guide.
• The PR does not contain any unnecessary code changes from Android Studio (reference).
• The PR is made from a branch that's not called "develop" and is up-to-date with "develop".
• The PR is assigned to the appropriate reviewers (reference).

For UI-specific PRs only

If your PR includes UI-related changes, then:

• Add screenshots for portrait/landscape for both a tablet & phone of the before & after UI changes
• For the screenshots above, include both English and pseudo-localized (RTL) screenshots (see RTL guide)
• Add a video showing the full UX flow with a screen reader enabled (see accessibility guide)
• Add a screenshot demonstrating that you ran affected Espresso tests locally & that they're passing

[github-actions]

Hi! @vaibhavmehrotraa Welcome to Oppia! Could you please follow the instructions here and sign the CLA Sheet to get started? You'll need to do this before we can accept your PR. Thanks!

[adhiamboperes]

Hi @vaibhavmehrotraa,
Could you please close one of the duplicate PRs?

[vaibhavmehrotraa]

Yeah sure I closed this duplicate PR!