Add new module type notice_xml which is used to define modules that generate...

Add new module type notice_xml which is used to define modules that generate NOTICE.xml.gz for partitions.

Bug: 330949782
Bug: 338342381
Test: lunch aosp_cf_x86_64_phone-trunk_staging-eng && m, and check that system/etc/NOTICE.xml.gz have all the XML elements.
Test: lunch aosp_cf_x86_64_phone_soong_system-trunk_staging-eng && m, and check that system/etc/NOTICE.xml.gz has root element only.
Change-Id: I82e90bd9aa3dabc605acfe8da697ab1f7e7ecf9b