Don't throw if hint session death link doesn't exist

Bug: 313458589
Bug: 312773552

Test: atest HintManagerServiceTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:ee142e2dbef2e8d05f415a36813e03fbfe1ec6e7)
Merged-In: I985a1869bd7575cad44a21394dc4d68d2248be6c
Change-Id: I985a1869bd7575cad44a21394dc4d68d2248be6c
diff --git a/services/core/java/com/android/server/power/hint/HintManagerService.java b/services/core/java/com/android/server/power/hint/HintManagerService.java
index 1a91d25..aa6991d 100644
--- a/services/core/java/com/android/server/power/hint/HintManagerService.java
+++ b/services/core/java/com/android/server/power/hint/HintManagerService.java
@@ -50,6 +50,7 @@
 import java.io.PrintWriter;
 import java.util.Arrays;
 import java.util.List;
+import java.util.NoSuchElementException;
 import java.util.Objects;
 
 /** An hint service implementation that runs in System Server process. */
@@ -520,7 +521,11 @@
                 if (mHalSessionPtr == 0) return;
                 mNativeWrapper.halCloseHintSession(mHalSessionPtr);
                 mHalSessionPtr = 0;
-                mToken.unlinkToDeath(this, 0);
+                try {
+                    mToken.unlinkToDeath(this, 0);
+                } catch (NoSuchElementException ignored) {
+                    Slogf.d(TAG, "Death link does not exist for session with UID " + mUid);
+                }
                 ArrayMap<IBinder, ArraySet<AppHintSession>> tokenMap = mActiveSessions.get(mUid);
                 if (tokenMap == null) {
                     Slogf.w(TAG, "UID %d is not present in active session map", mUid);