Revert "Use URIUtils version of Is{music|video}Db"

This reverts commit adcd36eb49892d92cc73076a0d0cce9942253c11.
Revert "Another optimization to IsSamePath"

This reverts commit b812581ca029b1c1f15c821fda04d6252b49a282.
Revert "Flip some && tests to do the cheap part first"

This reverts commit d3ed6b4e91c62057ffe0aa86fb6bb0765be0bd1f.