HWC/Copybit :: Add swap rect feature in HAL for MDP3

We brings all swap rect level checks in HAL from surfaceflinger
for MDP3.
swap rect kicks in case of
1 Only one layer is updating.
2 No overlaypping layers.
3.Both src and dst has same value.(no scaling)
4.No video layer

Change-Id: I881958994e80b53d4969beaaf51518b727a8de78