Merge "docs: Clarified how multi-window applies to activities in task stack" into mnc-mr-docs

  whether your app's activities support multi-window display. You can set

  attributes in your manifest to control both size and layout.

  A root activity's attribute settings apply to all activities

  within its task stack.

  within its task stack. For example, if the root activity has

  <code>android:resizeableActivity</code> set to true, then all activities

  in the task stack are resizeable.

</p>

<p class="note">