Fix build

Author: samtstern

app/src/main/res/layout/activity_chat.xml

@@ -42,6 +42,7 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
+            android:hint="@string/hint_message"
             android:imeOptions="actionDone"
             android:inputType="text" />
 

app/src/main/res/values/strings.xml

@@ -97,4 +97,5 @@
         Make sure your device is online and that Anonymous Auth is configured in your Firebase project
         (https://console.firebase.google.com/project/_/authentication/providers)
     </string>
+    <string name="hint_message">Say something…</string>
 </resources>