fix: audio converting time - rc 4.7 [WPB-9705]

[Garzas]

WPB-9705 [Android] App freezes and delays when sending voice messages

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What's new in this PR?

Cherry pick from fix for develop #3127

Issues

Converting audio file to m4a takes too long

Causes (Optional)

Bad user experience waiting for audio to be encoded

Solutions

• change audio encoding to wav
• introduce encoding state to be showed when user recorded long audio file

How to Test

1. Record long audio file (about 3mins)
2. After stop it should show Audio encoding message for few seconds
3. Send audio message

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[github-actions]

Test Results

930 tests   930 ✅  11m 38s ⏱️
123 suites    0 💤
123 files      0 ❌

Results for commit ec19b94.

[github-actions]

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