Fine. Change printing for dependencies: interfaces and methods.

In a future CL I will separate 'constructors' from 'methods'.

Change-Id: I3c8491faee2c3843160c4693a6c7eb7466daef1a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/423600
Commit-Queue: Konstantin Shcheglov <[email protected]>
Reviewed-by: Paul Berry <[email protected]>

Author: scheglov