Revert "ANDROID: umh: Enable usermode helper for required use cases"

This reverts commit c555553a.

Reason for revert: The binaries, and /sbin/ is not even present on Android systems.  This patch was never tested :(

Bug: 202192667
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ia1c35eba4a89a62ba678d8004742563372d3d920