Fix signature file

The signature file is using a fully qualified type;
I suspect this was generated before the format switchover.

Bug: None
Test: make update-api && make checkapi
Change-Id: Ia608a1e50b0a34e412a6db94980b7482d11dd749
Merged-In: I299fb8bdedeb23c946f115f2fd4b8a59553681b5
Exempt-From-Owner-Approval: Large-scale tooling change
1 file changed