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.

Bug: 27753949
Change-Id: I20196550aa3cc70afaff1930d5e90e1c3a59ea82
1 file changed