More UX updates around picking images.

When picking images or videos, hide the titles in recents, since the
thumbnails should speak for themselves.  Also respect new flag that
allows a directory to request their titles be hidden.

Show directory icon hint in grid mode when showing a thumbnail, to
remind user it's a directory.

Filter directories out of recents.  Hide most action bar icons on
phones, even when room.  Only show drawer on first launch.  Hide most
drawer headers to match spec.

Bug: 10710331
Change-Id: I0ef1973ddd62750f57345336388366eda1449720
diff --git a/res/menu/activity.xml b/res/menu/activity.xml
index 6c37a4e..d995376 100644
--- a/res/menu/activity.xml
+++ b/res/menu/activity.xml
@@ -19,7 +19,7 @@
         android:id="@+id/menu_create_dir"
         android:title="@string/menu_create_dir"
         android:icon="@drawable/ic_menu_new_folder"
-        android:showAsAction="ifRoom" />
+        android:showAsAction="always" />
     <item
         android:id="@+id/menu_search"
         android:title="@string/menu_search"
@@ -48,12 +48,12 @@
         android:id="@+id/menu_grid"
         android:title="@string/menu_grid"
         android:icon="@drawable/ic_menu_view_grid"
-        android:showAsAction="ifRoom" />
+        android:showAsAction="never" />
     <item
         android:id="@+id/menu_list"
         android:title="@string/menu_list"
         android:icon="@drawable/ic_menu_view_list"
-        android:showAsAction="ifRoom" />
+        android:showAsAction="never" />
     <item
         android:id="@+id/menu_settings"
         android:title="@string/menu_settings"