Modify multi-display Activity launching behavior

When choosing the display on which to launch an Activity, prefer the
display of the launching app over the display the launched Application
is already on.

Bug: 176199388
Test: manual - launch app on external display, launch via Launcher on
primary display, relaunch on external display

Change-Id: I95d8bce2662a0d38ce8399450ccf246a72afb9fd