RFR: 8304956: Update KeyStore.getDefaultType​() specification to return pkcs12 as fallback [v2]

[Ben Perez]

> Replaced "jks" with "pkcs12" in both the spec and fallback for `KeyStore.getDefaultType()`

Ben Perez has updated the pull request incrementally with one additional commit since the last revision:

  Changed KEYSTORE_TYPE spec to indicate pkcs12 default

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15625/files
  - new: https://git.openjdk.org/jdk/pull/15625/files/74573641..23c357be

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15625&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15625&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/15625.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15625/head:pull/15625

PR: https://git.openjdk.org/jdk/pull/15625