Android CLI supports a --no-metrics flag that supposedly disables data collection:

android --no-metrics info

To permanently disable metrics, you can create an .androidrc file in your home directory. Just include the flag:

--no-metrics

_{If someone wants to actually do some network monitoring to prove this works, that would be amazing. I might eventually do so myself if no one else does.}

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You can confirm that the android command is actually using your rc file by including a garbage flag. For example, including --proveit will cause this behavior:

.androidrc:

--no-metrics
--proveit

PS> android --no-metrics --version
Warning: failed to parse .androidrc: Unrecognized option: --proveit
1.0.16261425