opencensus-java: FTBFS with default Java 21

[Vladimir Petko]

The package opencensus-java ftbfs with default Java 21.
The relevant part of the build log:
---------------
All input files are considered out-of-date for incremental task ':opencensus-api:compileJava'.
Compiling with JDK Java compiler API.
warning: [options] source value 8 is obsolete and will be removed in a future release
warning: [options] target value 8 is obsolete and will be removed in a future release
warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.
error: warnings found and -Werror specified
:opencensus-api:compileJava FAILED
:opencensus-api:compileJava (Thread[#29,Daemon worker,5,main]) completed. Took 0.819 secs.

FAILURE: Build failed with an exception.
---------------

[Vladimir Petko (vpa1977)]

piuparts install/upgrade/purge (pass)

[Launchpad Janitor (janitor)]

This bug was fixed in the package opencensus-java - 0.24.0+ds-1ubuntu1

---------------
opencensus-java (0.24.0+ds-1ubuntu1) noble; urgency=medium

  [ Pushkar Kulkarni ]
  * d/rules, d/patches: Use java_compat_level to adjust -source/-target
    levels (LP: #2053295).

 -- Vladimir Petko <email address hidden> Fri, 16 Feb 2024 15:32:43 +1300