[Passpoint] Remove FEATURE_WIFI_PASSPOINT

Remove FEATURE_WIFI_PASSPOINT conditionals from WifiServiceImpl.java and
WifiInjector.java, since Passpoint is a feature that must be enabled.
Removed unnecessary unit test cases.

Bug: 134099536
Test: atest WifiServiceImplTest
Change-Id: I8f3e27a8ddf69e511bad5e467f8504578fd8e0d4
3 files changed
tree: 2c5142fadb85cb049d79affd59903adf7c46ebe9
  1. service/
  2. PREUPLOAD.cfg