Upgrade emulator to emu-master-dev build 7253699 am: 488e8f31ff am: 45b2d2012a

Original change: https://android-review.googlesource.com/c/platform/prebuilts/android-emulator/+/1663224

Change-Id: I7b4559729045aa6477728f75c16ff5a31cd2a7e7