Additional Pixel stuffs
You need to inherit updatable APEX in your device tree
Corresponding device tree commit: Add updatable_apex.mk
And need to set TARGET_SUPPORTS_APEX_UPDATE to true in your device tree
For example, in PixelExperience, you should add this flag to aosp_(device-code-name).mk
TARGET_SUPPORTS_APEX_UPDATE := true
And then include the config.mk's path to your device.mk
$(call inherit-product-if-exists, vendor/pixel-additional/config.mk)
You need to set TARGET_INCLUDE_CARRIER_SETTINGS to true in your device tree
For example, in PixelExperience, you should add this flag to aosp_(device-code-name).mk
TARGET_INCLUDE_CARRIER_SETTINGS := true
And then include the config.mk's path to your device.mk
$(call inherit-product-if-exists, vendor/pixel-additional/config.mk)