Delete committed rollbacks when they expire (4/n)

Now we delete available and committed rollbacks when they expire.
They will be moved to historical rollbacks for debugging purpose.

Bug: 172644981
Test: m
Change-Id: I96d81313936e392babf154b9da826470b4cb9d41

services/core/java/com/android/server/rollback/RollbackManagerServiceImpl.java

@@ -715,7 +715,7 @@ class RollbackManagerServiceImpl extends IRollbackManager.Stub implements Rollba
         Iterator<Rollback> iter = mRollbacks.iterator();
         while (iter.hasNext()) {
             Rollback rollback = iter.next();
-            if (!rollback.isAvailable()) {
+            if (!rollback.isAvailable() && !rollback.isCommitted()) {
                 continue;
             }
             Instant rollbackTimestamp = rollback.getTimestamp();