Delete a bunch of dead code and resources.

Deleted a bunch of unused colors. Also deleted the FAB
since it's never actually used, The one xml location sets the visibility
to gone and it is never changed.

Change-Id: I9424d581960ef879f6742bf8f06ac8932224c7cc

res/drawable/fab_background.xml

@@ -1,23 +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.
--->
-<ripple xmlns:android="http://schemas.android.com/apk/res/android"
-        android:color="@color/fab_ripple">
-    <item>
-        <shape>
-            <solid android:color="@color/fab_shape" />
-        </shape>
-    </item>
-</ripple>