Add heap configuration for 1080p phones with 2048m

 * Increase heap start size to 16m to minimize GC with larger bitmaps

Change-Id: I8fbba2e5a2a2cf2d7a6898ca6bae8639d6cf5a19
Abort surface composition if hw surface is invalid

If an invalid display device is detected during surface composition
(e.g., a simulated secondary display is removed), abort the
composition.

Change-Id: Ia6afb2e287882d8ae0614eb25463d3f85b687adf
gl_code.cpp: Remove a DOS style newline

Change-Id: Id3edd6e511371fa8b0afef2e90baed4662ed76c4
Signed-off-by: Bernhard Rosenkränzer <Bernhard.Rosenkranzer@linaro.org>