Echo Cancellation is not working with some Android phones

[iamianM]

Describe the bug

Echo Cancellation is not working with some Android phones with React Native. Similar to this issue:
https://livekit-users.slack.com/archives/C07FVFGAUKX/p1733717251711189
Which was fixed in Swift with this PR:
livekit/client-sdk-swift#536

The problem makes the AI unusable on some devices due to the AI speaking and then hearing itself and therefore going into a loop of talking to itself.

[iamianM]

This issue happens the entire call length and is only affected in speaker phone mode. I can confirm it happens on Samsung Z fold 3 and Samsung S20, but I think it affects a lot of Samsung devices, which make up like 90% of our Android users.

[davidzhao]

@iamianM which audio mode is the app set to? are you using communications?

[pgrignaffini]

@davidzhao we're using audio mode "inCommunication", some android phone works well while some others, like Samsungs, still pick echoes from the agent