Add product manifest and fragments.

Product manifest lives at /product/etc/vintf/manifest.xml
and fragments lives at /product/etc/vintf/manifest/*.xml.

Modules in the product partition that serves HIDL HALs should
declare them in the product manifest (fragments).

Bug: 130714844
Bug: 126770403
Test: vintf_object_test
Change-Id: I3812e4fcc305c163df281346ef2fa2dc5ad49397
3 files changed