Unhide framework constants and renamed errorType to type.

Constants:
1. The password credential type constant
2. The no-credential error type.

Bug: 246564035
CTS-Coverage-Bug: 263109618
API-Coverage-Bug: 263109618
Test: Local Build & Deployment
Change-Id: Ib858c31ba96e4a3fd7f4b13c9dc6c39ac268d5ab
10 files changed