add allowForSilence during recording

[tobika]

Responding to this issue: #102

We don't want the recording to stop immediately after the user stops to talk for a few milliseconds.

Since API 33 we need to use EXTRA_SEGMENTED_SESSION together with EXTRA_SPEECH_INPUT_COMPLETE_SILENCE_LENGTH_MILLIS to achieve this goal.

https://developer.android.com/reference/android/speech/RecognizerIntent#EXTRA_SEGMENTED_SESSION

Segmented session uses different callbacks on the RecognitionListener:
onSegmentResults which wors a bit like onPartialResults and onEndOfSegmentedSession.

If you want to use allowForSilence in the config you have to listen to this events in order to get the results.

This is a first proposal and I'm still questioning if there's not a simpler interface for the plugin users. Reusing the onPartialResults even though it works a bit different. Collecting all results on the java side and pushing them back in the classic promise resolve of the start function?

I'm not at all a java developer but it works. On the iOS side I haven't tested yet if there is a similar problem.

[tobika]

I forgot to add that this approach doesn't work with popup: true maybe I should add a check in the plugin that returns an error if this config parameters are not compatible?

[vovanb]

@tobika can you share working example with EXTRA_SEGMENTED_SESSION ?

[msty]

On the iOS side I haven't tested yet if there is a similar problem.

I have not observed the same problem on iOS after testing my app on both devices.

[azicchetti]

Thank you, this PR is quite useful. Without the allowForSilence option, this plugin is basically useless on android for long speeches, where a lot of pauses are the norm

[tobika]

Hi again,
After 1 year I came back to the project for which I initially developed this fix. Is there an intention to merge this? Or should there be some more changes, better documentation? Still have to copy/paste my own version in the node_modules ;)