Implement set_frost in contrast protocol

1 job for !257 with work/janb/frost in 1 minute and 58 seconds (queued for 176 minutes and 45 seconds)
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failed linux kf5-qt5 qt5.15 #116724

00:01:58

 
Name Stage Failure
failed
linux kf5-qt5 qt5.15 Build
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [CMakeFiles/Makefile2:474: src/server/CMakeFiles/KWaylandServer.dir/all] Error 2
make: *** [Makefile:146: all] Error 2
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Cleaning up file based variables
ERROR: Job failed: exit code 1