This CL is exactly the same as
I3df492c6d400fde36dea9e556deb3aa4987aa978, except adding EcdsaProtoTest
Rename Proto to TinkProto.

Change-Id: Iff2c97e6cf57aaf512e218c1fadbec305c2c8a6f
ORIGINAL_AUTHOR=Quan Nguyen <quannguyen@google.com>

GitOrigin-RevId: 4b68683c291825759c006df2925c15a8560ae590