Remove @VisibleForTesting annotation from Standard/PasspointWifiEntry

Compiling WifiTrackerLib with Blaze for SetupWizard causes a build
failure due to StandardWifiEntry/PasspointWifiEntry being marked with
@VisibleForTesting even though they are used outside of tests or
private references. Thus we need to remove this annotation from
StandardWifiEntry and PasspointWifiEntry.

Bug: 230821677
Test: build

Change-Id: I9e8ee1338c094e0e658a8799b93d901d34c64e19
2 files changed