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
Vectorize bitmap operations on A15 too

 * Commit a2e20761b5ad646ce3f08ed24995799dd81acee0 enables GCC
   vectorization for bitmap operations on Krait. Enable it on A15 also.

Change-Id: I1f733f5311376deb78782931ea2b83a8d12c2171
core: fix cpu variant board flag

Change-Id: I6f412d36162e50012a1d2562ab05a331f248582c
Generalize vectorization of Bitmap operation

 * All NEON-capable processors can support this.

Change-Id: I13d448e5864ea804f66cd1bbb93360cb8c0f0806
Bluetooth: Disable bluetooth only if BT Sevice is connected

Bluetooth service is imidiately disconnected from the adapter
after SSR OR if any bluetooth services is crashed OR framework
is crashed. As Bluetooth  service is not connected OR Bluetooth
is not enabled, So BT disable should be ignored & bluetooth
persist setting should not be changed.

CRs-Fixed: 499116

Change-Id: I19de939346d014cdf918e11711f2d6066e55d054