tree 9075991545916b8c1fed104d6478c8d9480c75d1
parent d2b1a57093f437d33b5b814df5da03ed317399b8
author jackqdyulei <jackqdyulei@google.com> 1537403307 -0700
committer jackqdyulei <jackqdyulei@google.com> 1537480700 -0700

Always evict old scanResults(> 15s) in WifiTracker

When fragment is created, it will force display all the APs
from mWifiManager.getScanResults, where it may have obsolete APs.

This CL will evict old scanResults even in this force display, so
it won't show obsolete APs anymore.

Also change the buffer size from 25s to 15s so it only display APs
scanned in last 15s.

Bug: 111738605
Test: SettingsUnitTests
Change-Id: I9413bcba81dba55c6b13cfdca2785069d4d7d105