[SB] Move chips Composable to its own function.

It was already a bit nested, and to address b/397506207 I think even
more code will be added to the chips logic.

Bug: 397506207
Flag: EXEMPT refactor
Test: manually verified chips still work
Change-Id: If0c99b8f4657c50647e82b8e95db4e5be0535ae7