Update D8 and R8 to 3.3.20-dev+aosp7

Version: 3.3.20-dev+aosp7
This build IS NOT suitable for preview or public release.

Built here: go/r8-releases/raw/3.3.20-dev+aosp7

Bug: 286362240
Test: TARGET_PRODUCT=aosp_arm64 m -j core-oj
Change-Id: I71220fb93dc0441de0a63d76ac19ba333d134a9c
2 files changed