Android新增开关安装apk选项

frameworks/base/services/core/java/com/android/server/pm/PackageInstallerService.java

@Override
public int createSession(SessionParams params, String installerPackageName,
        String callingAttributionTag, int userId) {
    try {
        return createSessionInternal(params, installerPackageName, callingAttributionTag,
                userId);
    } catch (IOException e) {
        throw ExceptionUtils.wrap(e);
    }
}
​

@Override
public int createSession(SessionParams params, String installerPackageName, int userId) {
    //新增开始
    if(!SystemProperties.getBoolean("persist.sys.install.allow", true)) {
        Slog.w(TAG, "Disallow install apk!");
        return -1;
    }
    Slog.w(TAG, "Allow install apk!");
    //新增结束
    try {
        return createSessionInternal(params, installerPackageName, userId);
    } catch (IOException e) {
​
}

packages/services/Car/car_product/build/car.mk

PRODUCT_PROPERTY_OVERRIDES += \
    persist.sys.install.allow=false