Fix dest == src bugs in Matrix.cpp.

The main bug was that the AutoJavaFloatArray autoSrc was not passing in
read only. This meant that the destructor overwrote the data which
the autoDst AutoJavaFloatArray had written in it's destructor.
This case only happened if src == dest and the arrays were copies.
Also improved performance by passing in read only a few other places.

Bug: 12570144

Change-Id: Idc8764087dc165433c584b87a0f9d4ed0ec795e8
[ActivityManager]: Fix the activity visibility state not sync between ActivityManager and WindowManager

Symptom:
When press Home key to home screen, user is able to see the activity's window shown on top of wallpaper and below launcher(widgets).

Root Cause:
The ensureActivitiesVisibleLocked() is called pretty often (for example when a new process bound).
If the top activity "B" was finishing, then the previous activity "A" should be visible.
Therefore, the activity "A" window will be set to visible and then launched activity "A", but it does not updates the visible state in ActivityRecord for "A".
There has a timing issue that if a new activity "C" is started, "C" becomes the new top activity and be resumed.
In that case, Activity "A" window will remain visible even if it is behind a full screen activity "C" because the ActivityRecord.visble of "A" is still false, so the window visibility won't be update.
So when user press home key and back to launcher, the surface of activity "A" will be composed on top of wallpaper.

Solution:
Updates ActivityRecord.visible to true for "A". After "C" is started, the "A" will be called WindowManagerService.setAppVisibility() to set invisible, then called onStop() when execute ensureActivitiesVisibleLocked() again.

Change-Id: I536ba04b95d8d274fea6d679a6493e620bc981e2
GpsLocationProvider: look for config file in /etc/gps.<ro.hardware.gps>.conf

The property ro.hardware.gps can be specifid to allow a single system
image to work with differrent GPS chips.  The HAL layer will use it to load
/system/lib/hw/gps.<ro.hardware.gps>.so.  Add support to GpsLocationProvider
to use the same property to find /etc/gps.<ro.hardware.gps>.conf, falling
back to /etc/gps.conf if the property is not set or the file is not present.

Change-Id: Ib285c4d28b0d0be5e038a1e61822edd8bc6d97d9
fb: unbreak recents animations on thumbnail click or dismiss recents screen

We load now correctly the recents screen and preload the first task on press
down off any key to get always recents without issues up. We cancel only
if any other key was pressed. I discovered during I am working on new recents
that this solves all issues but has one downside that if he user dismiss he recents
screen or click on one of the thumbnails to bring the choosen app to forground
that of course the last thumbnail is not cleared. Due that the entry animation
and some other things depent on what is currently preloaded we need to cancel
first task to have always in all cases the right animation.

Fix it with just calling cancelPreloadingFirstTask() if the user either
clicked on one of the thumbnails or dismissed the recents screen.

PS
- do the same when all thubmnails are swiped away
PS
- derp

Change-Id: I786c05d929f6a02b6d4928fc4a96aeb9a8e2d03e