Upgrade emulator to emu-master-dev build 8748233 am: 55b5662f8a am: 5876f2f12b

Original change: https://android-review.googlesource.com/c/platform/prebuilts/android-emulator/+/2133616

Change-Id: If63e66085d0536c58f9ea65787b98ff93eac6840
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>