Merge "Keystore 2.0 SPI: Silence warning about blocking calls to Keystore." am: fa8d51d5a6 am: ad73e362f0

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1706447

Change-Id: I13644c975e38ef52635c9e55cc4ccca2b96902fd