screenrecord: allow force landscape mode

Some devices' hardware encoder do not support encoding over a
specified height, which may be smaller than the device's display
height in portrait mode. Add a mode which uses landscape encoding
and rotation hint to overcome the limitation.

Change-Id: Icdd8de05d55c2aaaacbcaba4857173c78ef76a24
Merge "screenrecord: allow force landscape mode" into du44