Adhere to HIDL contract on cancel() method

Do not invoke the cancel method multiple times for a single client. This
currently can happen if the client cancels, and subsequently crashes.

Bug: 126205289

Test: Builds
Change-Id: I542ab23298b02928c872a255d0980d6e7e27f6c3

services/core/java/com/android/server/biometrics/ClientMonitor.java

@@ -209,11 +209,7 @@ public abstract class ClientMonitor extends LoggableMonitor implements IBinder.D
     public void binderDied() {
         // If the current client dies we should cancel the current operation.
         Slog.e(getLogTag(), "Binder died, cancelling client");
-        try {
-            getDaemonWrapper().cancel();
-        } catch (RemoteException e) {
-            Slog.e(getLogTag(), "Remote exception", e);
-        }
+        stop(false /* initiatedByClient */);
         mToken = null;
         mListener = null;
     }