Add content description to the voice key

Bug: 14849593
Change-Id: I1664b6a4ef54b78a09df65adbffff7861b54c4a9
diff --git a/java/res/layout/suggestions_strip.xml b/java/res/layout/suggestions_strip.xml
index 36898c8..3d2f07f 100644
--- a/java/res/layout/suggestions_strip.xml
+++ b/java/res/layout/suggestions_strip.xml
@@ -71,5 +71,6 @@
         android:layout_alignParentEnd="true"
         android:layout_alignParentRight="true"
         android:layout_centerVertical="true"
+        android:contentDescription="@string/spoken_description_mic"
         style="?attr/suggestionWordStyle" />
 </merge>