Update D8 and R8 to 8.0.22-dev am: ef9c34de04

Original change: https://android-review.googlesource.com/c/platform/prebuilts/r8/+/2318996

Change-Id: I44aeff387d4d5fc9a1a72c507eb21a1a0d85ef09
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>