Change the Network preference summary for wifi option

Bug:192987269
Test: Manual test
Test: make RunSettingsRoboTests
ROBOTEST_FILTER=NetworkProviderSettingsTest

Change-Id: I3892386f8fe2e5c3e29cd7e91f88db65c3693990
Merged-In: I3892386f8fe2e5c3e29cd7e91f88db65c3693990
3 files changed