Android: Removed a null entity handler initializer from OcPlatform

Android: Removed a null entity handler initializer from OcPlatform

This should have been removed as a part of the
https://gerrit.iotivity.org/gerrit/#/c/2346/

Change-Id: I3fd6de963b21174a41627ffdfe6b4e822bf313ee
Signed-off-by: Tim Kourt <tim.a.kourt@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/3001
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Patrick Lankswert <patrick.lankswert@intel.com>
(cherry picked from commit 3c369f1215c428337da5568fa14d0efaeb62fba7)
Reviewed-on: https://gerrit.iotivity.org/gerrit/3143
Reviewed-by: Jay  Sharma <jay.sharma@samsung.com>
Reviewed-by: Abhishek Pandey <abhi.siso@samsung.com>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>