hwcomposer: Transform pointer coordinates according to screen rotation

[dos1]

When the Android screen is rotated (for example, by running a landscape game on a portrait physical screen), mouse input isn't translated correctly - the pointer moves relative to Android's screen instead of actual screen and (unless the window is square) part of the Android screen isn't accessible at all.

To fix this, HWC should translate input pointer coordinates before sending them to InputFlinger.

Touch input isn't affected. Haven't tested tablet input.