SF: Fix Klockwork errors.

Resolve klockwork errors in frameworks/native
to avoid buffer overflow and memory leaks.

Change-Id: I7af17047538e621c872377090cea5b96f0924883
sf: Use Dirty Rect optimization in "Show Surface Updates" setting

When "Show Surface Updates" setting is ON in developer options, flash the
updating part (union dirty rect) instead of full layers when
GPU Tiled DR optimization is ON.

Change-Id: Id280cc2a22d46cc6539316d6dd0856e328c14c9e
CRs-Fixed: 679386
sf:  Add dirtyRect information to SF dumpsys

Display dirtyRect information generated for each layer in
SurfaceFlinger Dumpsys.

Change-Id: Ie60f4bf67bc28af0fcce006c166d8ae4ed4985e8
SF: Modify logic to handle "transparent Region" for displayFrame

sourceCrop and displayFrame calculations according to "transparent Region"
are not synchronized. Because of this mismatch scaling is introduced,
causing corruption in UI. To avoid this scaling, map displayFrame to
sourceCrop, apply reduce and remap result to displayFrame.

CRs-Fixed: 660699

Change-Id: I1e7ad5b1c8932413f53bb94a2e62895661b97057