Revert "remove support for glReadPixels screenshot path"

This reverts commit 3ca76f416bc8665a97636ca8a2d0128b9da9d92c.

Change-Id: I3a91c39a8cac64363afc58554d47b62b0510360d
SurfaceFlinger: try dropping features from EGL config query before giving up

Change-Id: I429ad841ef761dd9b036c6dca73b4af9337b277a
hwui: Update configuration for 2GB/1080p devices

Change-Id: I73357a35bee22d76d3fe8a98ece91c5c9d19371d

Conflicts:
	build/phone-xxhdpi-2048-hwui-memory.mk
Add heap configuration for 1080p phones with 2048m

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

Change-Id: I8fbba2e5a2a2cf2d7a6898ca6bae8639d6cf5a19
Merge remote-tracking branch 'Slim/kk4.4' into slim4.4