govenliu e88f5efeb9 [Wi-Fi] Apply cache in WifiTracker to update the signal icon immediatelly.
issue: Signal icon on the add wifi network feature need to wait for the scan result.
Solution: Apply the cache in the WifiTracker to update signal icon for
shortening the waiting time of new scan result.

Bug: 146842198
Test: Add following unit test cases to test signal level has been updated correctly:
      1. withOneSuggestion_whenScanResultChangedButWifiOff_uiListShouldHaveZeroLevel.

Change-Id: Id72e2b43e020f2cafa2af4af5ffb1c28529002bd
2020-02-04 10:40:55 +08:00
2019-03-27 07:14:20 +08:00
2019-04-04 12:49:15 -07:00
2019-11-25 20:28:35 +09:00
2020-01-24 09:44:43 -08:00
2019-02-06 15:44:40 +00:00
2020-01-31 14:59:59 +08:00
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3.1 GiB
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Java 89.8%
Kotlin 10.2%