EthernetDataTracker: indicate link up based on flags
EthernetDataTracker: indicate link up based on flags

Indicate link up state based on flags/interface up, and not on IP address.
This is for ethernet interfaces that already exists.

Change-Id: Ib342d519c483bbb2dfa08cfac2c0c1a288cee7c0
Signed-off-by: Vishal Mahaveer <9c93b0ec5c7dacd10ea50ed05a8fa5f367b92846@ti.com>

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