Speculative fix on compose crash

Compose crash due to ".0dp" on non-nexus devices
might be caused by popupElevation because it's
a v21 attribute. I don't see any other changes
in between the two signed builds that can cause
this.

b/16930855

Change-Id: Iba86ecdfa52ff281c531d5e0580826030281a1bf
diff --git a/res/values-v21/styles.xml b/res/values-v21/styles.xml
index 814fd5c..da4063b 100644
--- a/res/values-v21/styles.xml
+++ b/res/values-v21/styles.xml
@@ -45,4 +45,8 @@
 
     <style name="AbstractVacationResponderDateSpinnerBase"
            parent="android:Widget.Material.Light.Spinner" />
+
+    <style name="RecipientEditTextViewStyle" parent="@style/RecipientEditTextViewStyleBase">
+        <item name="android:popupElevation">0dp</item>
+    </style>
 </resources>