Android test results are not written to influx

I believe all test results on Android are silently being lost.

• Typically Coin reads the XML test result files found in COIN_CTEST_RESULTSDIR directory and inserts them to InfluxDB.
• AFAICT the "androidtestrunner" wrapper script writes all testresults to the same file "output.xml" in the current directory.
• Coin does not know about that file, instead looks in COIN_CTEST_RESULTSDIR and finds nothing. It does not complain, and results are lost.

In testresults I don't see "Android" in the "failed_test" measurement:

  > show tag values from failed_test with key=target_os

name: failed_test
key       value
---       -----
target_os Linux
target_os MacOS
target_os QNX
target_os WinRT
target_os Window

I see it instead in the "workitem" measurement, that records all builds/tests and not the individual test results:

  > show tag values from workitem with key=target_os

name: workitem
key       value
---       -----
target_os Android
target_os Fake
target_os INTEGRITY
target_os IOS
target_os Linux
target_os MacOS
target_os QNX
target_os TvOS
target_os WatchOS
target_os WinRT
target_os Windows