Restore DHCP client logging.
Restore DHCP client logging.

Bug: 28955598
Change-Id: I2e2684a787061612471830e4d840ce422091bafb

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