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

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

Change-Id: I6e1d72dbb6b6403bf944eee4ed0e0275ef41c401
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>