Remove multidex dependency

[dellisd]

The multidex artifact was added as a dependency of every androidx.media3 library module in this commit (889f435), which I understand was to simplify the configuration for the demo apps. This adds an unnecessary transitive dependency on the multidex artifact for apps that do not require it however.

[tonihei]

Thanks for reporting! This dependency was actually meant to be androidTestImplementation and not implementation, so that it gets automatically included in all instrumentation test builds.

[tonihei]

You can also manually exclude this dependency for now by using

implementation('androidx.media3:media3-exoplayer:1.1.0') {
  exclude group: 'androidx.multidex', module: 'multidex'
}