Merge "Revert "Keystore 2.0 SPI: Move keymint spec to security namespace."" am: bc641a41d8 am: 9e21ecbcb4

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1525805

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic1261e549180816219b7a3c4a7f73a5ce97c5119