changed default transport type on android platform

changed default transport type on android platform

if there is no trasport option from command line,
all transport should be enabled on android platform.

Change-Id: I78e7e3c0d7473f711db67a388d9ea0bbd5908587
Signed-off-by: hyuna0213.jo <hyuna0213.jo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/4135
Reviewed-by: Naga Ashok Jampani <jn.ashok@samsung.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/4407