Fix bug with app pairs appearing in wrong orientation in pinned Taskbar

This CL makes it so that app pairs do an orientation check in dispatchDraw() instead of only on init().

Previously we only checked orientation on AppPairIcon.inflateIcon(), and the issue was that orientation was not re-checked when pinned Taskbar was rotated to different sides of the screen. Added a DeviceProfileListener to update orientation when DP changes.

Fixes: 323288812
Flag: ACONFIG com.android.wm.shell.enable_app_pairs TRUNKFOOD
Test: Manual, app pair icon always has correct otientation on pinned taskbar
Change-Id: If2de1a4c7334fef1ba4c2edcca09bef9338bc73f