This is not required for code in the mainline module since the flag
infra is not supported for mainline. But we will need to write code
in UserManager and it needs to be guarded by new Thread flags.
Note that Merged-In is added to skip merging this CL into the
udc-mainline-prod branch because trunk stable flagging is not supported
there
Bug: 307679182
Test: m
Merged-In: I88c993680976d2e10d672bfdbf45119f2db13868
Change-Id: Id53fa3e7c9592b04f37f4cbd7dcd0499859e59ed
This commit declares the initial "thread_enabled" feature flag and use
this to flag all existing and future Thread system APIs with @FlaggedApi
Bug: 301473012
Test: build
Change-Id: I43f64ce38f7fd0806733b21c4f393e4563e6a467