Revert "Rename IUsdInterface to IStaInterface in the Mainline Su..."

Revert submission 32029057-mainline-supplicant-generalize-iface-type

Reason for revert: DroidMonitor: Potential culprit for http://b/400984769 - 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:32029057-mainline-supplicant-generalize-iface-type

Change-Id: Ie07c64aa932d4c12141d929090a52964249d9590
5 files changed