Revert "[TOFU] Don't send credentials in an unauthenticated TLS tunnel"

This reverts commit 32d02a1eed6e94a6a4c0fd23dc03573dd8320366.
This reverts commit 3877bd77f5eeee05bcf1292cdfaff1892def427b.

Reason for revert: Regression
Bug: 251910611
Test: m
Test: ClientModeImplTest InsecureEapNetworkHandlerTest
Updated-PDD: Not applicable - revert, will be reintroduced

Change-Id: I74e75d50bad859d656d27a5e2c714deefc2c3497
5 files changed