Fix conditional keep rules for new semantics

New conditional syntax is a logical AND, not OR. This means if a
resource should be conditionally kept by multiple ids, we need to
generate a separate rule for each condition (which will be interpreted
as OR).

Test: unit tests
Bug: 69341430
Change-Id: I0786c65561d36fbf43d181a2dfd0c7eaf1d96b8c