Fix to NullPointerException on move back in ActivityStack.

In ActivityTask.moveTaskToBackLocked NullPointerException may occur
when moving back with only current Activity in stack. This due to a
condition that may trigger despite a TaskRecord being null and then
attempt accessing the TaskRecord.mOnTopOfHome variable.

TaskRecord task may be set to null when no resumed activity remain.

Resolved by assuring that flag mOnTopOfHome is instead set to false
for current TaskRecord in case where there are no remaining activities
above home.

The above bug has already been corrected in the following commit,
ada62fca51d314cefe2c5da4e007df5b9abf320d, but it does not set the
cottect value to mTopOfHome for the current taks, see below.

Variable mOnTopOfHome will not be set to false in situations where
stack is of size 1 or less and task is null, perhaps from already
having finished current activity.

To avoid current TaskRecord maintaining value mOnTopOfHome to true
after launching Home this variable is set to false.

Impact should not be major due to correction earlier that makes sure
that there is always a TaskRecord.mOnTopOfHome set to true above Home
activity but if not correctly set for current task still gives a
possibility of bad behavior.

Change-Id: Ie86ad99c188aaa05b0de9d58eaa16c42b6fc4341
Only send storage intents after boot complete

It is not possible to send a broadcast before the system
boot is completed. If you do it anyway you will get an
IllegalStateException: Cannot broadcast before boot completed.

If a memory card is inserted or removed while the phone is
booting up, there is a risk that the MountService will try to
broadcast a storage intent too early, and cause the device
to crash.

Use FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT to avoid
problems with too early broadcasts.

Change-Id: Ied36a13d235df37c9788e45a35de40d919ae0cd0
FLAG_PRIVILEGED disappears if privileged app is updated and rebooted

Since Kitkat, an app pre-loaded under /system/priv-app/ has
FLAG_PRIVILEGED. However, if the app updated and the device
rebooted, privileged flag is unset from pkgFlags. This patch
fix issue to assign privileged flag when scanning the updated
packages.

Bug: 12640283

Change-Id: Ic24b5882f65dabdfae9cc39da3d68661bed4fc31
Initialize pointer members to NULL to avoid illegal reference

mBitmap and mTexture is not initialized to NULL which causes
illegal address access when it fails to be created from
oversized bitmap.

Change-Id: Iea54bec8788bc5f3a10040fdb43f416c0d41a14c
Fix error checking in MemoryFile.

mmap returns MAP_FAILED on failures, not 0 (NULL).
Also, convert some C style casts to C++ since they
make intent clearer.

Change-Id: I367993c73e9ee576f11ebe76e530d2c2f27c662d

Conflicts:
	core/jni/android_os_MemoryFile.cpp
Appears black screen fix for a while

This issue is side-effect of added google patch on KK MR1.

Fix a couple of issues with mOpeningApps.
https://android.googlesource.com/platform/frameworks/base/+/a8ee262c04749db4f32f73d2b9e7f58989c4638b%5E%21/#F0

[Reproduce path]
Settings -> Location -> Location OFF -> Location ON -> "Location consent Dialog" Popup-> "Agree btn" press
-> Black screen appears for a while

Change-Id: I14efdce87e8d78d38f9aae48568f69937e4fe1fa
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
AssetManager cookies should be int32_t and not void*.

Cookies are really indices into vectors and arrays, so
they don't need to be void*. We choose int32_t instead
of size_t to allow their width to be well specified.

(cherry picked from commit ebfdd0f467e39c3af8d92cade78263935340acb7)
(cherry picked from commit a7fa2e592e2e579e5acdb903dba83fc074ebc215)
(cherry picked from commit a9d5701b034ed2d9771b3f0943e1add00741d7cd)

Change-Id: I2aed3db568b6fdc487bf99e2c5dd123206736fda