Android CI Blog: avd setup.

avd-setup.sh

# Install the emulator tool
./tools/bin/sdkmanager --install emulator

# Install an AOSP image that would later be used as the AVD's OS
./tools/bin/sdkmanager --install "system-images;android-29;default;x86_64"

# Accept all licenses...
./tools/bin/sdkmanager --licenses
# To do that automatically in a script, try this:
yes | ./tools/bin/sdkmanager --licenses

# Create an AVD with the image we've previously installed
./tools/bin/avdmanager --verbose create avd --force --name Pixel_4_API_29 --abi x86_64 --device "pixel" --package "system-images;android-29;default;x86_64"

# (optional) Review your brand new AVD:
./tools/bin/avdmanager list avd