WifiScanningService: Remove ClienthandlerMap

Migrate all scans to use the new RequestList class to maintain the list
of active scans.

BUG: 28190728
Change-Id: Iad84fda9c50c0c1c493a399ce2adb2792ec75a2f
1 file changed
tree: d693feebb0d9f26d38feeed062ff47c53378a0c8
  1. service/
  2. tests/