test: do not rely on Card.clone().id == Card.id

for some reason with the update from anki 24.06.2 to 24.06.3 Card.clone()
no longer generates a stable Card.id

Luckily, this is only ever used in test code, and this is the only
place the id is ever compared so avoiding it functions well enough

AnkiDroid/src/test/java/com/ichi2/libanki/SchedulerTest.kt

@@ -847,7 +847,7 @@ open class SchedulerTest : JvmTest() {
         note.setItem("Front", "one")
         col.addNote(note)
         var c = note.cards()[0]
-        val orig = c.clone()
+        val origId = c.id
         val note2 = col.newNote()
         note2.setItem("Front", "two")
         col.addNote(note2)
@@ -878,7 +878,7 @@ open class SchedulerTest : JvmTest() {
 
         // the other card should appear again
         c = col.sched.card!!
-        Assert.assertEquals(orig.id, c.id)
+        Assert.assertEquals(origId, c.id)
 
         // emptying the filtered deck should restore card
         col.sched.emptyDyn(did)