This change allows 3 or less layer use cases to get bypassed completely via MDP pipes.
If more than 3 layers, all of them gets composited on FB.
Intended FB fallback cases:
1) 4 or more layers
2) Any MDP pipe is in use
3) Any layer needs rotation
4) Any layer is allocated from non-pmem
Change-Id: Ieb2b30b8ab9893fd68c7fc61ec889ac9a01cb7dd
(cherry picked from commit 001ffcfef1d63948926b1be67c4977d13ae1b159)
Conflicts:
libhwcomposer/hwcomposer.cpp
84961f81a5