Zip apex system server and standalone system server jars into system_server.zip.

Currently, the Art benchmark service is depending on the boot.zip file
to filter out boot image profiles based on the existing jars in this zip
file, and to expand profiling to apex system server jars and standalone
jars we need to export these jars in another zip file.

Bug: 241823638
Test: Checked the generated `system_server.zip` using `m droidcore dist`
Test: Checked with aosp and internal targets
Change-Id: I477dcfd3381bd24bdc50aabb773b38f8840f0ce0