Merge "fix the CWE problem in Biometrics." into main am: eb541f11cc

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3343379

Change-Id: I6a46b399e02250e5bae7f4f8b412c526dd244517
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/services/core/java/com/android/server/biometrics/BiometricService.java b/services/core/java/com/android/server/biometrics/BiometricService.java
index feef540..b0c4359 100644
--- a/services/core/java/com/android/server/biometrics/BiometricService.java
+++ b/services/core/java/com/android/server/biometrics/BiometricService.java
@@ -101,6 +101,7 @@
 import java.util.Random;
 import java.util.Set;
 import java.util.concurrent.atomic.AtomicLong;
+import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.function.Supplier;
 
 /**
@@ -132,7 +133,7 @@
     IGateKeeperService mGateKeeper;
 
     // Get and cache the available biometric authenticators and their associated info.
-    final ArrayList<BiometricSensor> mSensors = new ArrayList<>();
+    final CopyOnWriteArrayList<BiometricSensor> mSensors = new CopyOnWriteArrayList<>();
 
     @VisibleForTesting
     BiometricStrengthController mBiometricStrengthController;
@@ -156,13 +157,13 @@
         @NonNull private final Set<Integer> mSensorsPendingInvalidation;
 
         public static InvalidationTracker start(@NonNull Context context,
-                @NonNull ArrayList<BiometricSensor> sensors,
-                int userId, int fromSensorId, @NonNull IInvalidationCallback clientCallback) {
+                @NonNull List<BiometricSensor> sensors, int userId,
+                int fromSensorId, @NonNull IInvalidationCallback clientCallback) {
             return new InvalidationTracker(context, sensors, userId, fromSensorId, clientCallback);
         }
 
         private InvalidationTracker(@NonNull Context context,
-                @NonNull ArrayList<BiometricSensor> sensors, int userId,
+                @NonNull List<BiometricSensor> sensors, int userId,
                 int fromSensorId, @NonNull IInvalidationCallback clientCallback) {
             mClientCallback = clientCallback;
             mSensorsPendingInvalidation = new ArraySet<>();
@@ -844,7 +845,7 @@
 
         @android.annotation.EnforcePermission(android.Manifest.permission.USE_BIOMETRIC_INTERNAL)
         @Override
-        public synchronized void registerAuthenticator(int id, int modality,
+        public void registerAuthenticator(int id, int modality,
                 @Authenticators.Types int strength,
                 @NonNull IBiometricAuthenticator authenticator) {