RFR: 8282463: javax/sound/sampled/Clip/DataPusherThreadCheck.java fails

[Andrey Turbanov]

Test failed on Ubuntu, because both implementations of `MixerProvider` have no 
devices:
1. com.sun.media.sound.DirectAudioDeviceProvider#nGetNumDevices returns `0`
 ![DirectAudioDeviceProvider 
init](https://user-images.githubusercontent.com/741251/195988216-aa86da0f-739b-433f-87e2-86c2d6904a0d.png)
2. com.sun.media.sound.PortMixerProvider#nGetNumDevices returns `0`
 ![PortMixerProvider 
init](https://user-images.githubusercontent.com/741251/195988239-59678e0c-be7b-43ff-b02a-9abb2392e8f9.png)


It leads to `javax.sound.sampled.spi.MixerProvider#getMixerInfo` returns empty 
array.
![AudioSystem 
getMixedInfoList](https://user-images.githubusercontent.com/741251/195988266-1656e6d3-de4a-4e53-a613-415f60075726.png)

And DataPusher thread is not created, because of AudioSystem.isLineSupported 
returns false in the method 
`com.sun.media.sound.JavaSoundAudioClip#createSourceDataLine`.
I propose to perform the same check in test code and skip it.

-------------

Commit messages:
 - 8282463: javax/sound/sampled/Clip/DataPusherThreadCheck.java fails

Changes: https://git.openjdk.org/jdk/pull/10717/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10717&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8282463
  Stats: 6 lines in 1 file changed: 6 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/10717.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10717/head:pull/10717

PR: https://git.openjdk.org/jdk/pull/10717