Ensure we call prepare and scan for yielding desugarings

Change-Id: Iad387f8a10e9147d2f3bae26e944ec64f7f7a73b

src/main/java/com/android/tools/r8/ir/desugar/NonEmptyCfInstructionDesugaringCollection.java

diff --git a/src/main/java/com/android/tools/r8/ir/desugar/NonEmptyCfInstructionDesugaringCollection.java b/src/main/java/com/android/tools/r8/ir/desugar/NonEmptyCfInstructionDesugaringCollection.java
index 40e5b9f..184dff0 100644
--- a/src/main/java/com/android/tools/r8/ir/desugar/NonEmptyCfInstructionDesugaringCollection.java
+++ b/src/main/java/com/android/tools/r8/ir/desugar/NonEmptyCfInstructionDesugaringCollection.java
@@ -200,12 +200,14 @@
       ProgramAdditions programAdditions) {
     ensureCfCode(method);
     desugarings.forEach(d -> d.prepare(method, eventConsumer, programAdditions));
+    yieldingDesugarings.forEach(d -> d.prepare(method, eventConsumer, programAdditions));
   }
 
   @Override
   public void scan(ProgramMethod method, CfInstructionDesugaringEventConsumer eventConsumer) {
     ensureCfCode(method);
     desugarings.forEach(d -> d.scan(method, eventConsumer));
+    yieldingDesugarings.forEach(d -> d.scan(method, eventConsumer));
   }
 
   @Override