Bump Android Emulator to v30.0.12

[grendello]

Context: https://androidstudio.googleblog.com/
Context: https://androidstudio.googleblog.com/2020/03/emulator-3006-canary-windows-performance.html
Context: https://androidstudio.googleblog.com/2020/04/emulator-3007-canary.html
Context: https://androidstudio.googleblog.com/2020/04/emulator-3008-canary.html
Context: https://androidstudio.googleblog.com/2020/04/emulator-3009-canary.html
Context: https://androidstudio.googleblog.com/2020/05/emulator-30012-canary-psa-if-emulator.html

Changes (cumulative, since 30.0.5):

• Upgraded protobuf verison to 3.11.4
• Added experimental car data replay feature for when running
  Android Auto Embedded system images to the car data page in
  the extended controls.
• Fixed kernel version parsing issue when running aarch64 guest kernels
• Vulkan
  • Worked around issue that occurs on Windows NVIDIA GPUs when
    creating/destroying VkPipelineLayouts in multiple threads.
  • Improved support (fixes, performance improvements) for host-side
    video codecs. Requires a future Android R system image.
• Fixed hang on starting Windows emulator that happened right after
  the boot animation.
• Fixed issue where Vulkan external semaphore type OPAQUE_FD (in the
  guest) was not working on Windows hosts (due to bug in translation
  to win32 handle semaphores).
• Added support for vendor boot images (emulator side).
• GLES translator libraries have been changed to be linked statically.
  This should slightly improve download size and startup time, while
  having fewer ways to link the wrong GLES libraries.
• Removed libGLES12Translator as we use an internal GLES1 translator
  in all cases now for GLES1.
• Metrics are now tracked for extended window usage.
• Fixed issue where glTexStorage2D did not work with ASTC compressed
  texture formats (Requires corresponding change in system image)
• Removed prints about certs and GRPC on startup.
• macOS emulator no longer disables App Nap. If also run with
  -no-audio, the emulator should now stop from preventing sleep on
  macOS.
• Relaxed logical core requirement to 6 from 8 on macOS so more users
  can run images with multiple vCPUs.
• Fixed issue in Car AVDs where in the HAL property page, LEFT_FRONT
  was incorrectly labeled as "Front right".
• Fixed some GLES3 extensions not being able to be found after the move
  to static build in 30.0.8.
• eglChooseConfig called with null attrib_list argument now more
  liberally returns the first config found rather than bailing out.
• The emulator can now run embedded inside Android Studio. This
  requires Android Studio 4.1 Canary 8 or later, and needs to be
  enabled manually via Android Studio's Preferences > Tools > Emulator.
• We now detect 3rd party graphics driver hooks that have been
  observed in crash reports, and alert the user if any were involved
  in the crashing stack trace.
• Fixed graphics error when orphaning EGL images in the guest via
  glTexImage2D.
• Vulkan: Fixed a possible crash on guest process cleanup.
• Fixed possible issue in Linux embedded emulator where the
  advertisement file might have been written to the wrong location.
• Fixed a hang on AMD machines with AMD Hypervisor. This will require
  downloading and installing the latest Android Emulator Hypervisor
  for AMD Processors (v 1.5).
• Fixed possible memory corruption on Linux / macOS due to a path
  that used select() and did not check FD_SETSIZE limit.
• On Linux, instructions to enable KVM if permission is denied should
  print more visibly now.
• Removed "Screenshot failed to find cb 0" messages.
• Addressed a possible race condition with some versions of Vulkan
  loaders when creating many VkDevice/VkInstances in parallel.