Add a timeout waiting for contextual card loader.

- Intially setting it to 1 second.
- Also changed card appear animation from drop in to fade in. It looks
  less janky if we don't animate any size change.
- And some random code cleanup

Change-Id: I6e73bcf98fd9aa1d76ae002b94ab5b068dfecf1e
Fixes: 120916829
Test: robotests

res/anim/item_animation_fade_in.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2018 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.
+  -->
+
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+     android:duration="500">
+
+    <!-- Fade in: alpha from 0 to 100% -->
+    <alpha
+        android:fromAlpha="0"
+        android:toAlpha="1"
+        android:interpolator="@android:anim/decelerate_interpolator"/>
+
+</set>