Fix marquee on app snippet in InstalledAppDetails

First need to fix layout of the app_item as the widget was running
over the end of the view, do this by switching to a RelativeLayout.

Then select the view so it can actually marquee.

Bug: 22043942
Change-Id: Ieb94649ccf3dc8dcf56014c02fcdc06da71a9a62

src/com/android/settings/applications/InstalledAppDetails.java

@@ -763,6 +763,7 @@ public class InstalledAppDetails extends AppInfoBase
         TextView appVersion = (TextView) appSnippet.findViewById(R.id.widget_text1);
 
         if (!TextUtils.isEmpty(versionName)) {
+            appVersion.setSelected(true);
             appVersion.setVisibility(View.VISIBLE);
             appVersion.setText(appSnippet.getContext().getString(R.string.version_text,
                     String.valueOf(versionName)));