Revert "Remove connectivity dependency on Preconditions"

This reverts commit 1c17c8800266006daa3fc89da847f4e028112db8.

Reason for revert: Build broken: b/182721112

Change-Id: Ibc84ec6d7900fdcf0bc14cd7036f9c08287711db
6 files changed
tree: af2b1bd70d531ab15aa43ad81cf6f61241a0d8c0
  1. core/
  2. framework/
  3. service/
  4. services/
  5. tests/
  6. OWNERS