Add system app check for anomaly detection.

In this CL, don't blame system app in anomaly detection and also
add log for it.

Following CL will update it to also check whether this system app
has launch entry.

Bug: 77477987
Test: RunSettingsRoboTests
Change-Id: I97490b32bc42ec2f8e03ec2d82f7c8bf89f9c66f