Update tools/tradefederation/ paths.

- tools/tradefederation/error_prone_rules.mk in various Android.mk
- tools/tradefederation/core/proto/file_metadata.proto

BUG:36557513
Test: Built successfully with new path.
Change-Id: I1c3f46893bf2dfc3b189f65807e53a2de47c4c49
6 files changed