Merge "Keystore 2.0 SPI: Silence warning about blocking calls to Keystore." am: fa8d51d5a6 am: ad73e362f0 am: 41d04381e9

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

Change-Id: I3247db1b8db8691705a3a7856d696a84f0fd1413