Provide APEX list information to clients.

Convert the XML APEX information into objects, identifying APEX type (system, vendor,..)
based on the original path of APEX.

Add apex info cache to check for changes based on apex-info-list.xml file timestamp.

Bug: 239055387
Test: atest ApexUtil
Change-Id: I486aeac27b53882ea9a5c90d417252540aa834b3
7 files changed