Consider mScrollX when drawing the checkMarkDrawable

When mScrollX has a very large value the checkmark will not show,
unless it is considered when setting the bounds of the drawable.

Change-Id: Ic4c9bce950816686622baa7330ebb2e69ecfb8e6
frameworks/base: vectorize Bitmap operations

Enable gcc vectorizing optimizations for Bitmap operations within
libandroid_runtime.so.  Adds -ftree-vectorize -mvectorize-with-neon-quad
-fprefetch-loop-arrays to functions and compiles Bitmap.cpp in ARM mode
(necessary to enable vectorizing optimizations) for appropriate targets.

Change-Id: I12defef6f47adf41af849df6e750097f5906d92d

Conflicts:
	core/jni/Android.mk