Revert "WifiService: Return status from startScan()"

This reverts commit 7daee3fabb13a50a788fb2eb7aaec1f9ebc62efc.

Bug: 77297012
Change-Id: Iae02ea6b2dbe5a87849b0d00bbbb146a18e3b2f9
Reason: the change in the topic is breaking the build
2 files changed