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: I8727fbeddc87f9a3f12c9db08ffaeaca02a981c0