Use canonical name for SHA1withECDSA

When this Signature scheme was added to Conscrypt, we went with the
Bouncycastle name of "ECDSA." However, the Standard Names documentation
that "ECDSA" should not be used due to its ambiguity.

(cherry picked from commit b825b8339d9ba3649e0997a5328140b7f8479759)

Bug: 27753949
Change-Id: I20196550aa3cc70afaff1930d5e90e1c3a59ea82
1 file changed