RemovalClient should preempt auth

1) Enroll finger
2) Delete finger
3) Finger is immediately removed

Fixes: 180744398
Test: See above
Change-Id: I01485a796e1e3a7ec6b931ba1d3ab3a7aa1513b0

services/core/java/com/android/server/biometrics/sensors/RemovalClient.java

@@ -97,4 +97,9 @@ public abstract class RemovalClient<S extends BiometricAuthenticator.Identifier,
     public int getProtoEnum() {
         return BiometricsProto.CM_REMOVE;
     }
+
+    @Override
+    public boolean interruptsPrecedingClients() {
+        return true;
+    }
 }