Fix issue with copied methods not being checked.

In several places we were using IsMiranda to check if a method is
copied. This misses cases involving default methods.

(cherrypicked commit fcea56f9cc51957161fe7a6e35e895fd8c4c4a7f)

Bug: 27216437

Change-Id: I8c800e3e622a9c0ca0f8752c3d5202f433af9a1c
5 files changed