Merge "[adb] Correctly read host/user name on Windows." am: f0d9882ddb am: a0c115a38b am: 66feb7d758

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1380298

Change-Id: I4e6cfc8323f0533f99657133c26b9fb960a1b3a0