Fix an IllegalStateException in the OverlayConfigParser

The issue could be reproduced when the device defined an
overlay configuration file and an overlay package which
was in the configuration file also declared the required
system property in its manifest. The device works fine when
the required system property matches the corresponding
value on the device. But an IllegalStateException was thrown
from the system if it didn't match.

The root cause is that the package parser fails to parse the
overlay package if the required system property in the manifest
does not match the corresponding value on the device. It resulted
in the OverlayConfigParser could not find the package present
in the partition and throws the exception.

To resolve this issue, this CL skips the overlay configuration
if the package not found was caused by the system property
conditionon on the device.

Bug: 193422327
Test: atest OverlayConfigTest
Change-Id: I5650d796d92e3c4825b0d035e8e3b18f36d4cb47