Add a comment for a mysterious Boolean map value

PiperOrigin-RevId: 271892448
diff --git a/src/tools/android/java/com/google/devtools/build/android/AndroidResourceSymbolSink.java b/src/tools/android/java/com/google/devtools/build/android/AndroidResourceSymbolSink.java
index 88d2866..bba4f32 100644
--- a/src/tools/android/java/com/google/devtools/build/android/AndroidResourceSymbolSink.java
+++ b/src/tools/android/java/com/google/devtools/build/android/AndroidResourceSymbolSink.java
@@ -22,10 +22,13 @@
 
   void acceptSimpleResource(DependencyInfo dependencyInfo, ResourceType type, String name);
 
+  // "inlineable" below affects how resource IDs are assigned by
+  // PlaceholderIdFieldInitializerBuilder to attempt to match the final IDs assigned by aapt1.  This
+  // shouldn't matter, but legacy tests with ODR violations might be relying on this.
   void acceptStyleableResource(
       DependencyInfo dependencyInfo,
       FullyQualifiedName key,
-      Map<FullyQualifiedName, Boolean> attrs);
+      Map<FullyQualifiedName, /*inlineable=*/ Boolean> attrs);
 
   /**
    * Marks a resource as public.
diff --git a/src/tools/android/java/com/google/devtools/build/android/PlaceholderIdFieldInitializerBuilder.java b/src/tools/android/java/com/google/devtools/build/android/PlaceholderIdFieldInitializerBuilder.java
index 6b2d3e2..efce1dd 100644
--- a/src/tools/android/java/com/google/devtools/build/android/PlaceholderIdFieldInitializerBuilder.java
+++ b/src/tools/android/java/com/google/devtools/build/android/PlaceholderIdFieldInitializerBuilder.java
@@ -189,7 +189,8 @@
   private final Map<ResourceType, SortedMap<String, Optional<Integer>>> publicIds =
       new EnumMap<>(ResourceType.class);
 
-  private final Map<String, Map<String, Boolean>> styleableAttrs = new LinkedHashMap<>();
+  private final Map<String, Map<String, /*inlineable=*/ Boolean>> styleableAttrs =
+      new LinkedHashMap<>();
 
   private PlaceholderIdFieldInitializerBuilder(AndroidFrameworkAttrIdProvider androidIdProvider) {
     this.androidIdProvider = androidIdProvider;