power: autosleep for android filesystem

Modify the permission of file /sys/power/autosleep and add system
to service mediaserver group

Signed-off-by: Max Liao <liaops@embedinfo.com>
Enable multitouch for browser

With patch we can use two figure to room in and out using browser

Signed-off-by: Bo Shen <voice.shen@atmel.com>
remove the copy command of boot partiton

boot_$PRODUCT_DEVICE only contain file need for SD card boot, no
need to copy to boot partition

Signed-off-by: Royce Jiang <jiangxd@embedinfo.com>