Android test running in VM does not include logcat file, but running same test outside VM generates it

Example:

Builder: https://uberchromegw.corp.google.com/i/chromeos/builders/cyan-chrome-pfq/builds/903

On that builder page, there are links to both chromeos-image-archive and chromeos-autotest-results google storage locations (ie, the android.core.tests.libcore.package.harmony_java_math link under VMTest goes to chromeos-image-archive and the same label under HWTest goes to chromeos-autotest-results). The 'logcat' file is only in one of them, ie,

$ gsutil -m cp  -r gs://chromeos-image-archive/cyan-chrome-pfq/R59-9374.0.0-rc2/vm_test_results_1/test_harness/all/SimpleTestVerify/1_autotest_tests/results-02-cheets_CTS.6.0_r16.arm.android.core.tests.libcore.package.harmony_java_math .
$ gsutil -m cp  -r gs://chromeos-autotest-results/107192221-chromeos-test/chromeos4-row11-rack10-host13/ .
$ find . -name logcat

The logcat file only shows up in the chromeos-autotest-results archive (the chromeos4-row6-rack9-host19 folder).