hwc: Add support for bandwidth check

Add support for checking whether the current frame's required
bandwidth can be handled by MDP.

The max limit is configurable via a property and the value is
derived from simulation runs and profiling

Conflicts:
	libhwcomposer/hwc_mdpcomp.cpp

Change-Id: I46b46c346973fcb6487a8a656268171470ce69b9
diff --git a/libhwcomposer/hwc.cpp b/libhwcomposer/hwc.cpp
index 113e916..5fd7564 100644
--- a/libhwcomposer/hwc.cpp
+++ b/libhwcomposer/hwc.cpp
@@ -123,6 +123,7 @@
     }
 
     ctx->mAD->reset();
+    MDPComp::reset();
 }
 
 //clear prev layer prop flags and realloc for current frame