base: Add a key combo to start/stop video recording

Press volume up and power to start recording a video of your screen.
Press this key combo again to stop it.

PS2: rebased

Change-Id: Id0b13ba1092a1d6e0bf7bff5f14d89764cdf370c
Signed-off-by: Dan Trifan <jimsth@gmail.com>
Screenrecord: Create the Screenshots directory if it doesn't exist

Change-Id: I2b0458eed024dbda97e9e1ea3426c12d29add781