Add fast track window animations.

The enter animation works; the exit animation doesn't, because of the
associated with the activity.  In theory I have a dummy animation
also associated with the activity to keep it around during the exit
animation, but this isn't working and I need to figure out why.

Change-Id: I1a3a3e4832e62080c35b4bc8f888bdc2d90528c8
diff --git a/res/values/styles.xml b/res/values/styles.xml
index b656160..ad44b34 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -48,6 +48,14 @@
         <item name="android:windowContentOverlay">@null</item>
     </style>
 
+    <style name="FullyTranslucent.FastTrack">
+        <!-- This is a hack because we want to be able to animate away the
+             FastTrack window, and we close its containing activity at the
+             same time.  So put in a dummy animation so this guy sticks around
+             while the fast track window is animating. -->
+        <item name="android:windowAnimationStyle">@style/DummyAnimation</item>
+    </style>
+
     <style name="FastTrack">
         <item name="android:windowFrame">@null</item>
         <item name="android:windowBackground">@android:color/transparent</item>
@@ -59,4 +67,18 @@
         -->
     </style>
 
+    <style name="FastTrackAboveAnimation">
+        <item name="android:windowEnterAnimation">@anim/fasttrack_above_enter</item>
+        <item name="android:windowExitAnimation">@anim/fasttrack_above_exit</item>
+    </style>
+
+    <style name="FastTrackBelowAnimation">
+        <item name="android:windowEnterAnimation">@anim/fasttrack_below_enter</item>
+        <item name="android:windowExitAnimation">@anim/fasttrack_below_exit</item>
+    </style>
+
+    <style name="DummyAnimation">
+        <item name="android:windowExitAnimation">@anim/dummy_animation</item>
+    </style>
+
 </resources>