Update D8 and R8 to 3.3.20-dev+aosp5 am: 39d54c694c am: 49e992f71e

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/r8/+/18578424

Change-Id: I28d558ca16db990d81eaf1659e0d64fc37dbeb1b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>