Remove disabled alpha adjustment from SeekBar track

Bug: 21933285
Change-Id: Ifdf951dc7505c3f340fbc7775225f07d96aacb0c

core/res/res/color/control_nodisable_material.xml

@@ -0,0 +1,19 @@
+<?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:color="?attr/colorControlNormal" />
+</selector>

core/res/res/drawable/seekbar_thumb_material_anim.xml

@@ -25,7 +25,7 @@
             android:opticalInsetLeft="3dp"
             android:opticalInsetRight="3dp">
             <solid
-                android:color="#ff000000" />
+                android:color="@color/white" />
             <size
                 android:width="18dp"
                 android:height="18dp" />

core/res/res/drawable/seekbar_track_material.xml

@@ -18,7 +18,7 @@
     <item android:id="@id/background"
           android:gravity="center_vertical|fill_horizontal">
         <shape android:shape="rectangle"
-               android:tint="?attr/colorControlNormal">
+               android:tint="@color/control_nodisable_material">
             <size android:height="@dimen/seekbar_track_background_height_material" />
             <solid android:color="@color/white_disabled_material" />
         </shape>