Suppress error prone warnings in split checker

Change-Id: I8eafc8fe255f6c6b0fffd8ba0458e744578163fd
diff --git a/src/main/java/com/android/tools/r8/features/IsolatedFeatureSplitsChecker.java b/src/main/java/com/android/tools/r8/features/IsolatedFeatureSplitsChecker.java
index 746f860..ee3e64f 100644
--- a/src/main/java/com/android/tools/r8/features/IsolatedFeatureSplitsChecker.java
+++ b/src/main/java/com/android/tools/r8/features/IsolatedFeatureSplitsChecker.java
@@ -24,7 +24,10 @@
 public class IsolatedFeatureSplitsChecker
     implements EnqueuerFieldAccessAnalysis, EnqueuerInvokeAnalysis, EnqueuerTypeAccessAnalysis {
 
+  @SuppressWarnings("UnusedVariable")
   private final AppView<? extends AppInfoWithClassHierarchy> appView;
+
+  @SuppressWarnings("UnusedVariable")
   private final Enqueuer enqueuer;
 
   private IsolatedFeatureSplitsChecker(
@@ -52,14 +55,17 @@
         && enqueuer.getMode().isInitialTreeShaking();
   }
 
+  @SuppressWarnings("UnusedVariable")
   private void traceFieldAccess(FieldResolutionResult resolutionResult, ProgramMethod context) {
     // TODO(b/300247439): Check access.
   }
 
+  @SuppressWarnings("UnusedVariable")
   private void traceMethodInvoke(MethodResolutionResult resolutionResult, ProgramMethod context) {
     // TODO(b/300247439): Check access.
   }
 
+  @SuppressWarnings("UnusedVariable")
   private void traceTypeAccess(DexClass clazz, ProgramMethod context) {
     // TODO(b/300247439): Check access.
   }