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

(cherry picked from commit 90c9b692f97cc67a19896a1f0d760a3893a34702)
Show status bubbles only when idle

(cherry picked from commit e62cb51ead9fbc51793a2e497bcc04946e205769)