添加预构建APK后GrapheneOS自定义构建无法启动问题排查

我正在构建自定义GrapheneOS版本，尝试将预构建APK（Mdm.apk）纳入构建流程。将APK放入external/MyApp目录，修改build/target/product/handheld_product.mk添加该包的条目，同时创建独立预构建模块引入权限XML文件（app.grapheneos.appstore.xml）并将其设为Mdm.apk的依赖模块。

目录结构 #

external/
|-- MyApp/
|   |-- myapp.apk
|-- app.grapheneos.myapp.xml
build/
|-- target/
|   |-- product/
|   |   |-- handheld_product.mk

修改后自定义构建无法正常启动，设备卡在开机动画阶段无法继续。怀疑是预构建APK及其关联权限文件的引入方式存在问题。

handheld_product.mk相关代码片段 #

include $(CLEAR_VARS)
LOCAL_MODULE := app.grapheneos.myapp.xml
LOCAL_MODULE_CLASS := ETC
LOCAL_MODULE_TAGS := optional
LOCAL_PRODUCT_MODULE := true
LOCAL_MODULE_PATH := $(TARGET_OUT_PRODUCT_ETC)/permissions
LOCAL_SRC_FILES := permissions/$(LOCAL_MODULE)
include $(BUILD_PREBUILT)

include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE := myapp.apk
LOCAL_MODULE_CLASS := APPS
LOCAL_PRIVILEGED_MODULE := true
LOCAL_MODULE_PATH := $(TARGET_OUT)/priv-app
LOCAL_CERTIFICATE := PRESIGNED
LOCAL_SRC_FILES := myapp.apk
LOCAL_OPTIONAL_USES_LIBRARIES := androidx.window.extensions androidx.window.sidecar
LOCAL_REQUIRED_MODULES := app.grapheneos.myapp.xml
include $(BUILD_PREBUILT)

内容的提问来源于stack exchange，提问作者Muhammad Nadeem