Code cleanup: remove android:orientation=horizontal

MyTracks/res/layout/choose_activity_list_item.xml

@@ -19,7 +19,6 @@ limitations under the License.
   android:layout_height="wrap_content"
   android:layout_width="match_parent"
   android:minHeight="?android:attr/listPreferredItemHeight"
-  android:orientation="horizontal"
   android:paddingLeft="16dp"
   android:paddingRight="16dp" >
   <ImageView

MyTracks/res/layout/track_controller.xml

@@ -20,7 +20,6 @@ limitations under the License.
     android:id="@+id/track_controler_container"
     android:layout_height="wrap_content"
     android:layout_width="match_parent"
-    android:orientation="horizontal"
     android:paddingBottom="8dp"
     android:paddingTop="8dp" >
     <View

MyTracks/res/layout/track_details_tab.xml

@@ -23,8 +23,7 @@ limitations under the License.
       android:id="@android:id/tabs"
       android:layout_height="wrap_content"
       android:layout_weight="0"
-      android:layout_width="match_parent"
-      android:orientation="horizontal" />
+      android:layout_width="match_parent" />
     <FrameLayout
       android:id="@android:id/tabcontent"
       android:layout_height="0dp"

MyTracks/res/layout/track_edit.xml

@@ -38,8 +38,7 @@ limitations under the License.
         style="@style/EditLabel.WithPaddingTop" />
       <LinearLayout
         android:layout_height="wrap_content"
-        android:layout_width="match_parent"
-        android:orientation="horizontal" >
+        android:layout_width="match_parent" >
         <AutoCompleteTextView
           android:gravity="bottom"
           android:hint="@string/track_edit_activity_type_hint"

MyTracks/res/layout/track_widget_4x1.xml

@@ -17,7 +17,6 @@ limitations under the License.
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   style="@style/TrackWidgetBoundingBox" >
   <LinearLayout
-    android:orientation="horizontal"
     android:paddingBottom="4dp"
     android:paddingTop="4dp"
     style="@style/TrackWidgetFrame" >