Merge changes Id41f2523,I103d5dd0,I730ce952,Id486e9ba

* changes:
  emulator-qemu: Fix data directory lookup.
  android-configure.sh: Add --qemu-prebuilts-dir=<path> option.
  android/avd/util.c: Translate arm64-v8a ABI to arm64 CPU architecture.
  android/kernel/kernel_utils.c: Support probing version for ARM64 kernel images.