Enterprise suggestion's certificate share same lifecycle as suggestion

Enterprise network suggestion's certificate will add to keystore immediately after add the suggestion, and will only remove after suggestion is removed.

Bug: 150500247
Test: atest com.android.server.wifi

Change-Id: I85fb81a98f16b6a343fb35ce31e1426e333773b0
7 files changed
tree: 3caae84a3228b4f348afd7817ffa0b83b068b074
  1. apex/
  2. service/
  3. PREUPLOAD.cfg