Revert getMatchingOsuProviders(List<ScanResult>) API referencing hidden type

This partially reverts commit 8561aa3281a01486e9197adcc2d82ca81fb9a2e5 because
the added API references the OsuProvider type which is not part of the API.

Bug: 119556446
Test: make droid
Change-Id: Id13857bcb52e715148b06d27cf4096d08f751d37
Exempt-From-Owner-Approval: API only change
2 files changed