RFR: 8279801: EC KeyFactory and KeyPairGenerator do not have aliases for OID format

[Weijun Wang]

Add OID aliases for the 2 service. This makes sure KeyFactory can be created and read an encoded key without knowing what the OID in the encoding is for.

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Commit messages:
 - 8279801: EC KeyFactory and KeyPairGenerator do not have aliases for OID format

Changes: https://git.openjdk.java.net/jdk/pull/7036/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7036&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8279801
  Stats: 52 lines in 2 files changed: 45 ins; 2 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7036.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7036/head:pull/7036

PR: https://git.openjdk.java.net/jdk/pull/7036