Fix Wifi Metrics not uploading

WifiServiceImpl#isScanAlwaysAvailable() checks
for ACCESS_WIFI_STATE permission, which the
metrics app does not have. Instead, call
mSettingsStore.isScanAlwaysAvialable(), which
doesn't perform permission checking.

Bug: 157176197
Test: force upload metrics from app
Change-Id: I81810626d2a55f2099b7a8bfd44db557134fb888
1 file changed