Switch over to updated VPN warning strings

These are more consistent and have placeholders for the description of
whatever VPN apps are actually active.

Bug: 20516964
Bug: 17474682
Change-Id: I37ff287b795f10bbbb192540f09f8100bb27b1a0
1 file changed
tree: e6b5a3810405e6e3295f605392a93bda45ed3aa6
  1. core/
  2. services/
  3. tests/