In OpenHarmony system applications HAP packages such as Launcher, SystemUI, Settings 
are located under /system/app directory. These packages are automatically installed and 
started at system initialization. These system apps are treated differently from
third party applications that can be installed using `hdc install`, for example 
they have a different UID range and different permissions (they cannot be uninstalled).

This fixes testcases ActsBundleManagerTest::getBundleInfo_1300 and ActsBundleManagerUninstallTest::uninstall_0600

Relate-to: https://gitlab.eclipse.org/eclipse/oniro-core/meta-openharmony/-/issues/21



Signed-off-by: Francesco Pham <francesco.pham@huawei.com>