clarify open TODO RE: AbnormalExit discriminator for ANR hints

Author: supervacuus

sentry-android-core/src/main/java/io/sentry/android/core/ApplicationExitInfoEventProcessor.java

@@ -682,9 +682,8 @@ private final class AnrHintEnricher implements HintEnricher {
 
     @Override
     public boolean supports(@NotNull Object hint) {
-      // TODO: not sure about this. all tests are written with AbnormalExit, but enrichment changes
-      //  are ANR-specific. I called it AnrHintEnricher because that is what it does, but it
-      //  actually triggers on AbnormalExit. Let me know what makes most sense.
+      // While this is specifically an ANR enricher we discriminate enrichment application
+      // on the broader AbnormalExit hints for now.
       return hint instanceof AbnormalExit;
     }
 

sentry/src/main/java/io/sentry/hints/AbnormalExit.java

@@ -2,7 +2,15 @@
 
 import org.jetbrains.annotations.Nullable;
 
-/** Marker interface for Sessions experiencing abnormal status */
+/**
+ * Marker interface for Sessions experiencing abnormal status.
+ *
+ * <p><b>Note:</b> While this interface applies to the broad category of abnormal exits (meaning any
+ * exits that weren't classified as normal terminations or crashes) it currently is exclusively used
+ * as a hint marker for Android ANRs (both watchdog and ApplicationExitInfo based). If additional
+ * categories of abnormal exits were introduced, all instances of discriminator code (`instanceof
+ * AbnormalExit`) should be carefully reviewed for ANR specifics accidentally being applied.
+ */
 public interface AbnormalExit {
 
   /** What was the mechanism this Session has abnormal'ed with */