Keystore 2.0: Add CREATE_DATETIME unconditionally.

Add CREATE_DATETIME unconditionally on generation and import.

Ignore-AOSP-First: Cherry-picked from AOSP.
Test: CtsKeystoreTestCases
Bug: 204578637
Bug: 204502660

Merged-In: I5b6eb8647d2595e575c72476010ccabf0a1a4527
Change-Id: I5b6eb8647d2595e575c72476010ccabf0a1a4527
1 file changed