Build icing against the "current" SDK for mainline compatibility. am: ac858b3f91 am: b8a1d87ef4 am: 8f28221159

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/icing/+/14804613

Change-Id: Ibfb9bbcba08b0bc88c7163d3826dcbf5b7e624b9