Allow the user to block notifications for foreground services.

Stepping carefully around the fix in change Idc788527, we
perform security (and AppOps, and therefore user block)
checks against the uid passed to enqueueNotificationInternal
rather than the Binder caller.

Bug: 9502541
Change-Id: I91745db92823381df75721c1b8f11013a7fa4ecc

Conflicts:
	services/java/com/android/server/NotificationManagerService.java
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