Clear BCB if space allocation failed

setupBcb() is called before allocating space, if space allocation
failed, we should clearBcb() to properly release resources.

Test: th
Bug: 221001516
Change-Id: Idce67925503cf910ab226b193a4387c32225c0bb

core/java/android/os/RecoverySystem.java

@@ -674,10 +674,12 @@ public class RecoverySystem {
             }
             try {
                 if (!rs.allocateSpaceForUpdate(packageFile)) {
+                    rs.clearBcb();
                     throw new IOException("Failed to allocate space for update "
                             + packageFile.getAbsolutePath());
                 }
             } catch (RemoteException e) {
+                rs.clearBcb();
                 e.rethrowAsRuntimeException();
             }