Allow override of DUN settings

Allow override of system DUN settings by setting
persist.sys.dun.override
to one of the following values:
2 = not set, 0 = DUN not required, 1 = DUN required
If the prop is not set or is set to an invalid value the system setting
will be used.

Conflicts:
	services/java/com/android/server/connectivity/Tethering.java

Change-Id: I296f303a23351e4ab29898895abfcd313c747db9
Sounds: Cleanup duplicate ringtones/alarms

Removes duplicates from AllAudio makefile and fixes title tag of
Promethium (from Platinum).

Change-Id: I767a846dbc5575ec9f86b1326e0b9f7aa015086b
frameworks/base: Add support for fully transparent layers

Allow apps to specify a window to be fully transparent. This hint
can be used later by the compositor to drop the layer.

Change-Id: Ib58f1026e74ca39e7160d2adcb34ebf50ec28a9a
Optimize drawBitmapMesh using TRIANGLE_STRIP

Draw BitmapMesh using STRIP instead of TRIANGLES.
Depending on where the bottleneck is located in the pipeline,
there is a potential for saving two-thirds of the time spent rendering.
The speedup is due to avoiding redundant operations,
i.e., mapping each vertex four times to texture and color attribute,
sending each vertex twice to the GPU, vertex processing of GPU ...

In this patch:
1. Refactoring mesh using Strip.
2. Batch triangles by adding degenerate triangles.
3. Optimize computing positions of texture and color attribute.

Benchmark: Drawing Bitmap(1152x768 px) with 200x200 meshes
Performance is doubled (from 26.4 fps to 53 fps, Nexus10).
Memory footprint: only 17% of original method.
(from 240000 to 40401 vertices with xy, uv, rgba data.)

Change-Id: I08c5c20d981d88528ce7b02012feefae468d6ec4
Signed-off-by: kui.zheng <kui.zheng@arm.com>