WifiInjector: Retrieve ip memory store lazily

IpMemorystore may be created much later than when wifi service is run.

Bug: 113174748
Test: atest com.android.server.wifi
Test: Device boots up & connects to wifi networks, hotspot toggle, etc.
Change-Id: I8c6b2af0e210b673136573845f969f48601ba192
1 file changed
tree: b74574dd668b68643c7799b5bc206996e04bb0e8
  1. service/
  2. PREUPLOAD.cfg