Update desugar dependencies. am: a6a6d9b236

Original change: https://android-review.googlesource.com/c/platform/external/desugar/+/2287853

Change-Id: I9adf2566e8ed451cfa96117db93a8250e06b8d70
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>