Many of the fields in `flag_artifact` are not valid in
the all_build_flag_definitions artifact.
Bug: 328495189
Test: manual
Ignore-AOSP-First: cherry-pick
Merged-In: I00eab1ef76f67f7db2118a6fc0d5771e3dd39fbb
Change-Id: I00eab1ef76f67f7db2118a6fc0d5771e3dd39fbb
This will be used to gather build flag declarations
Bug: 328495189
Test: manual, TH
Ignore-AOSP-First: cherry-pick
Merged-In: I155c26b1442347c4d433c9cbf22b94d944636702
Change-Id: I155c26b1442347c4d433c9cbf22b94d944636702