Fix Layout for WebViewTest

The WebView had 0 height causing the testFind* tests to fail.
Fix the layout to make the WebView fill its container.

Change-Id: Iff234dd1236483adfce94028c2e7b35bd241f9f8
diff --git a/tests/res/layout/webview_layout.xml b/tests/res/layout/webview_layout.xml
index 7a0ed0d..d266d21 100644
--- a/tests/res/layout/webview_layout.xml
+++ b/tests/res/layout/webview_layout.xml
@@ -17,9 +17,9 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content">
+    android:layout_height="match_parent">
 
     <WebView android:id="@+id/web_page"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content" />
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
 </LinearLayout>