commit 6fb8b256c18b47bf9443db7ee02d25d92d404f8e
author Victor Hsieh <victorhsieh@google.com> Fri Dec 03 16:30:04 2021 -0800
committer Victor Hsieh <victorhsieh@google.com> Mon Dec 06 12:15:34 2021 -0800
tree b92b3c787bf2568ecd01954916b8aa3246ba738e
parent 5f34abe565afc2d2b14cba59ba572318e4612103

composd: prepare staging directory w/ libartpalette-system

Output files are staged until they are fully generated, then move to the
final location. The staging directory has a different SELinux context to
prevent misuse, and should change when it's moved to the final
directory.

This change makes composd to follow the same setup, using libartpalette.
As a result, the output are no longer stored in CompOS's own apexdata
(which was not intentional).

This change does not use bindgen, which seems have some difficulty to
bridge `const char**` correctly. Neither cxx, since it doesn't seem to
simplify the (already simple) call.

Bug: 205750213
Test: See odrefresh produces output in the staging directory

Change-Id: Ifc97b31a98052a31209556449d1642089a8c0e2e