title: Userdata image not generated after AOSP build for Car
body: <p>I have built the AOSP in Ubunutu 18.04 using the below commands, but the userdata.img is not generated, and unable to start the emulator.</p>
  <p>When I try to create a new emulator from Android Studio AVD, a new emulator started up without any issues.</p>
  <p>Why user data image is not generated?
  Thanks in advance.</p>
  <pre><code>$ repo init -u https://android.googlesource.com/platform/manifest
  $ repo sync
  $ source build/envsetup.sh
  $ lunch aosp_car_x86_64-userdebug
  $ make -j4
  build was successful
  $ emulator
  
  emulator: Android emulator version 30.9.0.0 (build_id 7651928) (CL:N/A)
  2021-10-10 21:52:31.152 bluetooth - /buildbot/src/android/emu-master-dev/system/bt/vendor_libs/test_vendor_lib/model/setup/device_boutique.cc:33 - Register: Registering beacon_swarm
  2021-10-10 21:52:31.152 bluetooth - /buildbot/src/android/emu-master-dev/system/bt/vendor_libs/test_vendor_lib/model/setup/device_boutique.cc:33 - Register: Registering beacon
  2021-10-10 21:52:31.152 bluetooth - /buildbot/src/android/emu-master-dev/system/bt/vendor_libs/test_vendor_lib/model/setup/device_boutique.cc:33 - Register: Registering scripted_beacon
  2021-10-10 21:52:31.152 bluetooth - /buildbot/src/android/emu-master-dev/system/bt/vendor_libs/test_vendor_lib/model/setup/device_boutique.cc:33 - Register: Registering remote_loopback
  2021-10-10 21:52:31.152 bluetooth - /buildbot/src/android/emu-master-dev/system/bt/vendor_libs/test_vendor_lib/model/setup/device_boutique.cc:33 - Register: Registering car_kit
  2021-10-10 21:52:31.152 bluetooth - /buildbot/src/android/emu-master-dev/system/bt/vendor_libs/test_vendor_lib/model/setup/device_boutique.cc:33 - Register: Registering classic
  2021-10-10 21:52:31.152 bluetooth - /buildbot/src/android/emu-master-dev/system/bt/vendor_libs/test_vendor_lib/model/setup/device_boutique.cc:33 - Register: Registering sniffer
  2021-10-10 21:52:31.152 bluetooth - /buildbot/src/android/emu-master-dev/system/bt/vendor_libs/test_vendor_lib/model/setup/device_boutique.cc:33 - Register: Registering keyboard
  emulator: WARNING: encryption is off
  handleCpuAcceleration: feature check for hvf
  [swscaler @ 0x39ac000] No accelerated colorspace conversion found from yuv420p to bgra.
  cannot add library /home/&lt;User&gt;/workspace/aosp/prebuilts/android-emulator/linux-x86_64/qemu/linux-x86_64/lib64/vulkan/libvulkan.so: failed
  added library /home/&lt;User&gt;/workspace/aosp/prebuilts/android-emulator/linux-x86_64/lib64/vulkan/libvulkan.so
  emulator: ERROR: VkCommonOperations.cpp:537: Failed to create Vulkan instance.
  configAndStartRenderer: setting vsync to 60 hz
  qemu-system-x86_64: Could not open '/home/&lt;User&gt;/workspace/aosp/out/target/product/generic_car_x86_64/userdata-qemu.img': No such file or directory
  
  </code></pre>
  <p>List of files in the out/target/product/generic_car_x86_64 directory</p>
  <pre><code>drwxrwxr-x 16     4096 Oct 11 16:28 ./
  drwxrwxr-x  3     4096 Oct  8 21:57 ../
  -rw-rw-r--  1       22 Oct  8 22:07 android-info.txt
  drwxrwxr-x 29     4096 Oct  9 12:52 apex/
  drwxrwxr-x  2     4096 Oct  9 13:47 appcompat/
  drwxrwxr-x  3     4096 Oct  9 20:41 build.avd/
  -rw-rw-r--  1       98 Oct  9 10:28 build_fingerprint.txt
  -rw-rw-r--  1       67 Oct  9 10:28 build_thumbprint.txt
  -rw-r--r--  1 69206016 Oct  9 20:41 cache.img
  -rw-r--r--  1   196616 Oct 11 16:28 cache.img.qcow2
  -rw-rw-r--  1   194410 Oct  8 21:57 clean_steps.mk
  -rw-rw-r--  1       51 Oct  9 10:28 .copied_headers_list
  drwxrwxr-x  2     4096 Oct  9 11:39 debug_ramdisk/
  drwxrwxr-x  2    12288 Oct  9 11:39 dexpreopt_config/
  -rw-rw-r--  1      114 Oct 11 16:28 emu-launch-params.txt
  drwxrwxr-x  2     4096 Oct  9 13:43 fake_packages/
  drwxrwxr-x  4     4096 Oct  8 22:37 gen/
  -rw-rw-r--  1     3338 Oct 11 16:28 hardware-qemu.ini
  -rw-------  1        6 Oct 11 16:28 hardware-qemu.ini.lock
  -rw-------  1        6 Oct 11 16:26 hardware-qemu.ini.tmp-A4LpOF
  -rw-rw-r--  1  3426377 Oct  9 10:28 .installable_files
  -rw-rw-r--  1  3426377 Oct  8 22:00 .installable_files.previous
  -rw-rw-r--  1  1025766 Oct  9 13:48 installed-files.json
  -rw-rw-r--  1     8521 Oct  9 11:55 installed-files-ramdisk.json
  -rw-rw-r--  1     2639 Oct  9 11:55 installed-files-ramdisk.txt
  -rw-rw-r--  1     3155 Oct  9 11:39 installed-files-root.json
  -rw-rw-r--  1      688 Oct  9 11:39 installed-files-root.txt
  -rw-rw-r--  1   401433 Oct  9 13:48 installed-files.txt
  -rw-rw-r--  1     4717 Oct  8 22:05 misc_info.txt
  -rw-rw-r--  1 33768703 Oct  8 22:07 module-info.json
  -rw-rw-r--  1 36369198 Oct  8 22:07 module-info.json.rsp
  -rw-rw-r--  1        0 Oct 11 16:28 multiinstance.lock
  drwxrwxr-x 14     4096 Oct  9 13:50 obj/
  drwxrwxr-x  6     4096 Oct  9 11:24 obj_x86/
  -rw-rw-r--  1       51 Oct  8 22:00 previous_build_config.mk
  drwxrwxr-x 11     4096 Oct  9 11:55 ramdisk/
  -rw-rw-r--  1 12934660 Oct  9 11:56 ramdisk.img
  drwxrwxr-x 24     4096 Oct  9 11:39 root/
  drwxrwxr-x  5     4096 Oct  9 11:55 symbols/
  drwxrwxr-x 16     4096 Oct  9 13:45 system/
  -rw-rw-r--  1 83827456 Oct  9 13:50 system.img
  -rw-rw-r--  1       67 Oct  9 13:50 system-qemu-config.txt
  -rw-rw-r--  1  3145728 Oct  9 13:51 system-qemu.img
  -rw-rw-r--  1     4096 Oct  9 13:50 vbmeta.img
  drwxrwxr-x  4     4096 Oct  9 11:58 vendor/
  -rw-rw-r--  1      356 Oct  9 13:50 VerifiedBootParams.textproto
  </code></pre>