Bluetooth: Avoid window leak when screen orientation changes

Enable screen orientation change support in Bluetooth Settings app
during any Bluetooth Setting Activity. Otherwise, window leak may
observe while screen orientation changes.

CRs-Fixed: 556653
Change-Id: I8868f4c6e96277fd17484f810de6a700198a5287
Merge "Bluetooth: Avoid window leak when screen orientation changes" into jb-mr2