Make tag used in IpClientLinkObserver shorter.

So far the log tag used in IpClientLinkObserver is something like
"IpClientLinkObserver/wlan0", the length > 23, just use "IpClient"
instead to make the tag shorter.

Bug: 163492391
Test: m
Change-Id: Ifdb088df393a4a99146a670915f4a8243d63536c
1 file changed