[IOT-1426] Clean android examples with scons clean option
[IOT-1426] Clean android examples with scons clean option

Change-Id: I29d57c2759d6073c01a9f888b2f7b9930c16590e
Signed-off-by: George Nash <acbdc39d528a4315fe0b532d55c50ae46f5c1667@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/13833
Tested-by: jenkins-iotivity <09cb29e8a2b473a2c978382eec13ee06fa017bda@opendaylight.org>
Reviewed-by: Larry Sachs <87b901be7a441bcf97cbe259c532df419aac788e@intel.com>
Reviewed-by: Dave Thaler <8a98d0850f57b73c42d096f8f8b11e2d5522d554@microsoft.com>
Reviewed-by: Rick Bell <74cf0087f675c7c2d5c6f65986a0832071d4b512@intel.com>

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