Remove CaptivePortal deps on @hide MetricEvents

The legacy metrics are deprecated, and CaptivePortal is planned to move
to a connectivity-specific jar which cannot reference MetricsEvents.

Bug: 171540887
Test: m
Change-Id: I409375de3844a7fedef707cf9e19a106d82a8e3a
1 file changed
tree: 980ae773deee6d9e5dc8897d1247971bb414bb37
  1. core/
  2. services/
  3. tests/