CameraServiceProxy: Query recent tasks for top activity data

Certain top activities will not trigger the "onTaskMovedToFront"
callback which can result in incorrect resizeability
queries. This can happen when a new activity is launched in the top
task.
To avoid this, retrieve the necessary information via the reported
recent tasks by activity manager for a given user id.

Bug: 203044281
Test: Manual using camera application

Change-Id: I61efd4282a2231e6354e5514fc25d7d27005335b