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
Updated storage configuration again

* Ref:https://source.android.com/devices/tech/storage/config-example.html
Revert "Remove TARGET_ARCH_LOWMEM"

This reverts commit bec14e18596fe31054b033de019d123c8e2ae0ff.
Revert "Disable low ram config"

This reverts commit 6885b474243b1a0d1dd92a1c4bceaf17e3e821fb.
Revert "Allow more background services"

This reverts commit 471b1d677d291546a824f7fb8d6e2b5e5810c744.
Add force.highendfgx sys prop

 * This is also available in performance settings, but adding
   it here just in case we want to set it enabled in the future.