Flags must only be declared in one place in the tree. This change
prevents new ones from being added while we fix the bad flags already
present.
Bug: 352105274
Test: manual
Merged-In: I8c4bf2b2852685e84177500f28fe8908016082b9
Change-Id: I8c4bf2b2852685e84177500f28fe8908016082b9