Add new Edge APIs and convert listeners

Up until now all edges were KTF -> KTF edges. Now edges can also be KTF
-> STL or vice versa. Therefore we need APIs that are able to accept
these new edges. This also enables us to do central conversion and
verification. This CL provides these APIs and converts many callers.
There are more specialized cases that require conversion (or flagged
removal) in follow-up CLs.

The auto-convert introduced in the previous CL converts many cases but
a) It can't convert all and b) We need to eventually convert all uses
to the new API and also need a way to verify that no invalid edges are
used when scene container is enabled.

This CL enables this migration period where warnings will be shown if
old unconverted edges or newly added edges are using invalid KTF edges
based on the used flag.

Test: None
Bug: b/330311871
Flag: ACONFIG com.android.systemui.scene_container DEVELOPMENT
Change-Id: I8c0078736652871234e3ba2a0b0308a2a342c8a8