telemetry_perf_unittests failing on chromium.android/Android N5X Swarm Builder

Builders failed on: 
- Android N5X Swarm Builder: 
  https://build.chromium.org/p/chromium.android/builders/Android%20N5X%20Swarm%20Builder



First failing build: https://build.chromium.org/p/chromium.android/builders/Android%20N5X%20Swarm%20Builder/builds/14074

Individual tasks seem to be failing with an error about timing out connecting to the device?
https://chromium-swarm.appspot.com/task?id=37af77fa6dbb0910&refresh=10&show_raw=1

Command: /usr/bin/python ../../testing/scripts/run_telemetry_as_googletest.py ../../tools/perf/run_tests -v --browser=android-chromium --device=android --isolated-script-test-output=/b/swarming/w/io4qVxHH/output.json --isolated-script-test-chartjson-output=/b/swarming/w/io4qVxHH/chartjson-output.json

INFO:devil.utils.cmd_helper:[host]> /b/swarming/w/ir/third_party/catapult/devil/bin/deps/linux2/x86_64/bin/adb devices
INFO:devil.utils.cmd_helper:[host]> /b/swarming/w/ir/third_party/catapult/devil/bin/deps/linux2/x86_64/bin/adb devices
INFO:devil.utils.cmd_helper:[host]> /b/swarming/w/ir/third_party/catapult/devil/bin/deps/linux2/x86_64/bin/adb -s 00c4b10e3fb45050 shell '( ( c=/data/local/tmp/cache_token;echo $EXTERNAL_STORAGE;cat $c 2>/dev/null||echo;echo "f96eef14-759e-11e7-8068-0242ac110006">$c &&getprop )>/data/local/tmp/temp_file-9995955ba92e6 2>&1 );echo %$?'
INFO:devil.utils.cmd_helper:[host]> /b/swarming/w/ir/third_party/catapult/devil/bin/deps/linux2/x86_64/bin/adb -s 00c4b10e3fb45050 pull /data/local/tmp/temp_file-9995955ba92e6 /b/swarming/w/itnZ1tPx/tmpwU7eKi/tmp_ReadFileWithPull
INFO:devil.utils.cmd_helper:[host]> /b/swarming/w/ir/third_party/catapult/devil/bin/deps/linux2/x86_64/bin/adb -s 00c4b10e3fb45050 shell '( ls /root );echo %$?'
INFO:devil.utils.cmd_helper:[host]> /b/swarming/w/ir/third_party/catapult/devil/bin/deps/linux2/x86_64/bin/adb -s 00c4b10e3fb45050 shell 'rm -f /data/local/tmp/temp_file-9995955ba92e6'
INFO:devil.utils.cmd_helper:[host]> /b/swarming/w/ir/third_party/catapult/devil/bin/deps/linux2/x86_64/bin/adb -s 00c4b10e3fb45050 root
INFO:devil.utils.cmd_helper:[host]> /b/swarming/w/ir/third_party/catapult/devil/bin/deps/linux2/x86_64/bin/adb -s 00c4b10e3fb45050 wait-for-device
CRITICAL:root:Timed out. Dumping threads.

I'm not quite sure what to make of this... adding trooper label to see if they know something?