Check for a status bar offset when spinning up the remote view activity ...

...and handle its offset in the input handler.

I use my phone as a workstation sometimes and I like to be able to see the status bar for incoming notifications while connected to a remote host. I actually added an option to not force fullscreen, but thought that may be overkill for general users. Using the Xposed AppSettings module, I can force the viewer not to go fullscreen, but then the mouse coordinates are offset by the height of the status bar. This patch detects any height offset and adjusts the mouse coordinates accordingly.

A good alternative feature request to this would be to allow each connection to specify fullscreen, regular, or the new immersive mode in the advanced settings.