Direct access to Netd from the bluetooth process is disallowed by SELinux policy. This change reverts to the old behavior where IpManager interacts with NetdService indirectly via NetworkManagementService. Bug: 36492299 This partially reverts commit af39244a34f4449c12a5f925222c9bc8d8049320. Change-Id: Icf20b1e24abf7dd3123760f8637928bde7afe06b