Retrofit devices do not do allocatable space / 2.

Retrofit devices have two supers, so the allocatable
space does not need to be halved.

Test: manual OTA
Bug: 118506262
Change-Id: I31c77b9318e7c0b6bc6d1a8ae6efa70a3383b05f
diff --git a/dynamic_partition_control_android.h b/dynamic_partition_control_android.h
index 52d4f5b..0ccab4e 100644
--- a/dynamic_partition_control_android.h
+++ b/dynamic_partition_control_android.h
@@ -30,6 +30,7 @@
   DynamicPartitionControlAndroid() = default;
   ~DynamicPartitionControlAndroid();
   bool IsDynamicPartitionsEnabled() override;
+  bool IsDynamicPartitionsRetrofit() override;
   bool MapPartitionOnDeviceMapper(const std::string& super_device,
                                   const std::string& target_partition_name,
                                   uint32_t slot,