Changed attachToActivity() for SLIDING_CONTENT to replace the android
id/content FrameLayout rather than being a child of it. This reduces one
level from the view hierarchy.

Signed-off-by: Jared Woolston <jwoolston@tenkiv.com>
Forced constant use of hardware layers.

Signed-off-by: Jared Woolston <jwoolston@tenkiv.com>