Change fingerprint enrolling animation to 4 colors

This change includes two parts:
1. Change the scan animation from grey to 4 colors
2. Change the registered blink from blue to 4 colors

Bug: 75963029
Test: Manual
Change-Id: I0a0d68e82e8427bb46095461878502899f273bda

res/color/fingerprint_indicator_background_activated.xml

@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-    Copyright (C) 2015 The Android Open Source Project
-
-    Licensed under the Apache License, Version 2.0 (the "License");
-    you may not use this file except in compliance with the License.
-    You may obtain a copy of the License at
-
-        http://www.apache.org/licenses/LICENSE-2.0
-
-    Unless required by applicable law or agreed to in writing, software
-    distributed under the License is distributed on an "AS IS" BASIS,
-    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-    See the License for the specific language governing permissions and
-    limitations under the License.
--->
-
-<selector xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:alpha="0.5" android:color="?android:attr/colorAccent" />
-</selector>