Set sdcard0 as removable
* Our device is in "physical primary only" storage category
* Reference:https://source.android.com/devices/tech/storage/config-example.html
* Mediaprovider issue fixed in cm sources
  http://review.cyanogenmod.org/#/c/66055/
  http://review.cyanogenmod.org/#/c/66057/
Change composition type to dynamic
* it can help to fix graphical slowdowns on browser
keylayouts: Added missing SEARCH key
* our touchscreen driver has this key too
  https://github.com/arco/samsung-kernel-msm7x30/blob/cm-11.0/drivers/input/touchscreen/ancora/melfas_mcs8000.c#L164