Fix missing import in InternalOptions

Change-Id: I6af545b13b79e8a5038426f2ff6f4c56b1ce3383
diff --git a/src/main/java/com/android/tools/r8/utils/InternalOptions.java b/src/main/java/com/android/tools/r8/utils/InternalOptions.java
index 281bc1b..c9b09f8 100644
--- a/src/main/java/com/android/tools/r8/utils/InternalOptions.java
+++ b/src/main/java/com/android/tools/r8/utils/InternalOptions.java
@@ -84,6 +84,7 @@
 import com.android.tools.r8.optimize.redundantbridgeremoval.RedundantBridgeRemovalOptions;
 import com.android.tools.r8.optimize.singlecaller.SingleCallerInlinerOptions;
 import com.android.tools.r8.origin.Origin;
+import com.android.tools.r8.partial.R8PartialCompilationConfiguration;
 import com.android.tools.r8.partial.R8PartialSubCompilationConfiguration;
 import com.android.tools.r8.position.Position;
 import com.android.tools.r8.profile.art.ArtProfileOptions;