Util.SDK_INT <= 23 or Util.SDK_INT <= 24

### Hi,

in example on github your use `Util.SDK_INT <= 23`

https://github.com/googlecodelabs/exoplayer-intro/blob/main/exoplayer-codelab-04/src/main/java/com/example/exoplayer/PlayerActivity.kt

but example on codelab your use `Util.SDK_INT <= 24`

https://developer.android.com/codelabs/exoplayer-intro#2

What is correct?

Compare the SDK_INT checks in the linked GitHub example at exoplayer-codelab-04/src/main/java/com/example/exoplayer/PlayerActivity.kt and the Android Developers codelab section. Determine which condition is correct for the codelab, then make the example and codelab consistent and verify both references show the same guidance.

Written by the indexing model from the issue text.