Upgrade emulator to emu-master-dev build 6629878 am: f5e1c21102 am: 7674f8d13c

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/android-emulator/+/12009314

Change-Id: Idea8d0cac612b72f7c16335131890e63fcba21db