Apply test changes related to flag cleanup.

Changes related to cleanup of
safety_center_show_error_entries_on_timeout, update CTS test to prevent
breakage.

Take 2 without accidental change to imports of hostside tests.

CP of I1f9dc8749d46f437c8dfbb98228ed1f042ee5821 with only test changes.

Bug: 289788052
Test: SafetyCenter tests
Relnote: N/A
Merged-In: I1f9dc8749d46f437c8dfbb98228ed1f042ee5821
Change-Id: I89408fa1c5744f40ed88195afa4fde7dd5c12d2e