Report JS thread hangs as errors on Android #6985

#6964 adds JS thread hang tracking on iOS only. Android needs the same feature.

An Android version was implemented and works, but it was removed from #6964. When the tracker was on, a reload of the sample app often crashed with SIGABRT on the hermes-sampling thread (invalid pthread_t ... passed to pthread_kill, meta/hermes#1853). The same crash also happened without the tracker, with profiling only. This is the crash from #5441, which is closed.

To do:

• Find and fix the cause of the reload crash.
• Add the Android tracker again. The code is in commit 5cfe303 on the alwx/feature/3460 branch.

Related: #3460, #6964, #5441