envsetup: Fix adb recovery state detections

 * The original commands were checking a file,
    and validating that adb ran without error,
    resulting in an always-true result

 * Fix eat and _adb_connected by properly
    checking the 'test -e' error code

Change-Id: I49f82f04f4b51097be76f03bf7021203665da76f
1 file changed