Update Android Sample App to enable findResource on unicast BLE

Update Android Sample App to enable findResource on unicast BLE

since findResource on multicast in BLE is not supported anymore,
it should be updated

Change-Id: Ie26c3b50d9f9624a392931027d546bd7a040d6bc
Signed-off-by: jihwan.seo <jihwan.seo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/15559
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Larry Sachs <larry.j.sachs@intel.com>
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>
Reviewed-by: Jaehong Jo <jaehong.jo@samsung.com>
Reviewed-by: Rick Bell <richard.s.bell@intel.com>