DHCP: Add a Java DHCP client.
DHCP: Add a Java DHCP client.

The behaviour of the client is intended to mirror the behaviour
of the current DhcpStateMachine + dhcpcd combination, except it
does not store leases across network changes.

Bug: 19704592
Change-Id: I110b58003da2d8293059d48a0181e16f7f7f145c

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base