title: Android Studio - avoid layout warning for different APIs
body: <p>I have this in res/layout</p>
  
  <pre><code>&lt;TextView
      android:id="@+id/textView1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignBaseline="@+id/txt"
      android:layout_alignBottom="@+id/txt"
      android:layout_toRightOf="@+id/txt"
      android:text="@string/..."
      android:layout_marginLeft="3dp"
      android:textAppearance="?android:attr/textAppearanceSmall" /&gt;
  </code></pre>
  
  <p>I get warnings that layout_toRightOf should be layout_toEndOf and that layout_marginLeft should be layout_marginStart to better support right to left layouts. </p>
  
  <p>So I made 2 layouts and put the other one inside layout-v17 and changed what it wanted. While layout-v17 is OK now, the warnings on the original layout file are still there, how can I let it know I already handled that?</p>