Clean up all the layouts.

Utilize styles when possible.

MyTracks/res/layout/marker_list.xml

@@ -14,7 +14,7 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 -->
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<merge xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_height="fill_parent"
   android:layout_width="fill_parent" >
   <ListView
@@ -26,4 +26,4 @@ limitations under the License.
     android:text="@string/marker_list_empty_message"
     style="@style/ListEmptyTextView" >
   </TextView>
-</FrameLayout>
+</merge>