Update D8 and R8 to 3.3.20-dev+aosp1 am: 3d7bf6717e am: 50a08d874a am: fa425ece42

Original change: https://android-review.googlesource.com/c/platform/prebuilts/r8/+/2049608

Change-Id: I2df656b14f23e77267112fd98e93c1fa89e24e79
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>