aosp-9.0/device/ti/beagle_x15/beagle_x15.mk
...
PRODUCT_NAME := beagle_x15
PRODUCT_DEVICE := beagle_x15
PRODUCT_BRAND := Android
PRODUCT_MODEL := AOSP on BeagleBoard X15
PRODUCT_MANUFACTURER := Texas Instruments Inc


========== ========== ========== ==========

lazy way to hard code setting

asop/build/tools/buildinfo.sh
#!/bin/bash

echo "# begin build properties"
echo "# autogenerated by buildinfo.sh"

#### here
echo "ro.product.locale.language=zh"
echo "ro.product.locale.region=CN"
echo "persist.sys.timezone=Asia/Shanghai"

========== ========== ========== ==========
lazy way to hard code setting

asop/build/core/main.mk
...
## eng ##

ifeq ($(TARGET_BUILD_VARIANT),eng)
tags_to_install := debug eng
ifneq ($(filter ro.setupwizard.mode=ENABLED, $(call collapse-pairs, $(ADDITIONAL_BUILD_PROPERTIES))),)
# Dont require the setup wizard on eng builds
ADDITIONAL_BUILD_PROPERTIES := $(filter-out ro.setupwizard.mode=%,\
$(call collapse-pairs, $(ADDITIONAL_BUILD_PROPERTIES))) \
ro.setupwizard.mode=OPTIONAL
endif
endif

#### here
ADDITIONAL_DEFAULT_PROPERTIES =
ADDITIONAL_DEFAULT_PROPERTIES += ro.greatcat=1
ADDITIONAL_DEFAULT_PROPERTIES += ro.adb.secure=0
ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=0
ADDITIONAL_DEFAULT_PROPERTIES += ro.allow.mock.location=1
ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=1

========== ========== ========== ==========
to find the setting of feature
--->
android.software.home_screen
--->
asop/device/ti/beagle_x15/tablet_core_hardware_beagle_x15.xml