Upgrade emulator to emu-master-dev build 7651928 am: 88a4701bdc am: b9f08cf111 am: 81ffa94a9d

Original change: https://android-review.googlesource.com/c/platform/prebuilts/android-emulator/+/1799627

Change-Id: I8009d8c357a83f954c8bdf4454c07151805afb8c