Change exit animation to use normal z-order.

Bug: 33198426
Change-Id: I57f2f6360c165fbea25adf9b43f052e09261364b
diff --git a/core/res/res/anim/slide_out_micro.xml b/core/res/res/anim/slide_out_micro.xml
index 7532ee3..cccf697 100644
--- a/core/res/res/anim/slide_out_micro.xml
+++ b/core/res/res/anim/slide_out_micro.xml
@@ -19,7 +19,7 @@
 -->
 
 <set xmlns:android="http://schemas.android.com/apk/res/android"
-     android:zAdjustment="top">
+     android:zAdjustment="normal">
     <translate android:fromXDelta="0" android:toXDelta="5%p"
                android:duration="250"
                android:interpolator="@android:interpolator/fast_out_slow_in"/>