Ability of the change the voice of Amazon Polly in runtime according to language of Text

**Which AWS Services is the feature request for?**
Amazon Polly

**Is your feature request related to a problem? Please describe.**
I am following [this documentation](https://docs.amplify.aws/lib/predictions/text-speech/q/platform/android).

In order to use Polly from Android, I have to set up the voice when I set up
the resource. So this is the only voice that can be used in my app.

If I have some text that is in a different language than the voice that I set
up earlier, I can't change the voice according to the language of the new text.

For example, suppose I set up an `English- Joanna - Female`, at the beginning.
But the text I have now is in Chinese. So, I want to use the `Polly Chinese-
Zhiyu` voice to read the Chinese text.

I didn't see any documentation about how to programmatically change the Polly
voice at runtime.

**Describe the solution you'd like**
I want to programmatically change the voice according to the language of the
text, at runtime. Is it possible to do that? If I can do that, please provide
me some information on this.

**Describe alternatives you've considered**
Alternatively, can let me set up all the voice supported by AWS into the
project at the beginning may be?

Start with the Android text-to-speech documentation linked in the issue and the Amazon Polly voice configuration it describes. Determine whether selecting a voice at runtime is supported; done means clarifying the supported configuration or documenting the API changes needed to choose a voice for different languages.

Written by the indexing model from the issue text.