Update d8.bat to not use find_java.bat am: eed2e6f63a

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/r8/+/13354560

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I8d0f5f20152fd62ecc4b70b8a548d170e133838f