This ensures that the `ANDROID_SERIAL` environment variable is exported
when
`ADB_SERIAL` is set. This is crucial because Android Gradle Plugin's
`android.injected.device.serial` property can silently fall back to
selecting
all attached devices if the serial doesn't match exactly. Exporting
`ANDROID_SERIAL` provides a deeper level of filtering for spawned `adb`
binaries, maintaining the intended device selection.
Brummel
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