title: Set background color of selected main menu item of BrowseFragment
body: <p>I am using Leanback BrowseFragment and need to be able to set background colour of header item when selected. Any direct method/XML attributes available to do that? I have been looking into BrowseFragment and leanback themes.xml.</p>
  
  <p>Reference:
  <a href="https://developer.android.com/reference/android/support/v17/leanback/app/BrowseFragment.html" rel="nofollow">https://developer.android.com/reference/android/support/v17/leanback/app/BrowseFragment.html</a>
  <a href="https://android.googlesource.com/platform/frameworks/support/+/master/v17/leanback/res/values/themes.xml" rel="nofollow">https://android.googlesource.com/platform/frameworks/support/+/master/v17/leanback/res/values/themes.xml</a></p>