Revert "Remove containment check and assert class is instantiated if pinned"

This reverts commit 5089087f855bd27b879a3c57b7cfc8b3517e577b.

Reason for revert: assert does not hold, can't build R8 lib

Change-Id: I42ed387201677d637d0d08632db4177fbecf206b
diff --git a/src/main/java/com/android/tools/r8/shaking/Enqueuer.java b/src/main/java/com/android/tools/r8/shaking/Enqueuer.java
index 9efd5c1..cd9db29 100644
--- a/src/main/java/com/android/tools/r8/shaking/Enqueuer.java
+++ b/src/main/java/com/android/tools/r8/shaking/Enqueuer.java
@@ -2083,13 +2083,15 @@
       return;
     }
 
-    if (instantiatedTypes.contains(clazz) || instantiatedInterfaceTypes.contains(clazz)) {
+    // TODO(mkroghj): Remove pinnedItems check here.
+    if (instantiatedTypes.contains(clazz)
+        || instantiatedInterfaceTypes.contains(clazz)
+        || pinnedItems.contains(clazz.type)) {
       markVirtualMethodAsLive(
           clazz,
           encodedPossibleTarget,
           graphReporter.reportReachableMethodAsLive(encodedPossibleTarget, reason));
     } else {
-      assert !pinnedItems.contains(clazz.type);
       Deque<DexType> worklist =
           new ArrayDeque<>(appInfo.allImmediateSubtypes(possibleTarget.holder));
       while (!worklist.isEmpty()) {