Revert "Un-ignore the testBackNavigation after depending in UiAu..."

Revert submission 24733912

Reason for revert: Potential culprit for b/300305372 - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.
Reverted changes: /q/submissionid:24733912

Change-Id: I46c0292bf8694f700249965f8a4236e6030e833c
1 file changed