Add ability to answer call with hardware HOME button (1/2)

(preparation for winter time)
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<New edits>:
PS2: Fix port forward compatibility issues and fix up double if statement used in 4.1
PS3: Fix brace derp
Change-Id: I88ff168e3bb1accab9a531267812333c0ae68059
PowerMenu: Security Feature (Toggle) to Hide Reboot (reboot recovery) 2/2

Added missing "}"
Changed "If" to "if"
Added POWER_DIALOG_SHOW_REBOOT_HIDE in Settings.java
Removed tabs...

PS7-8: Hide -> Show to get in-line with other feats. Show by default.

Change-Id: I2ceb4bf42e3f0350cf6b4764a0b8e032b32836a3
Sound Toggle: Improve logic with new icons.

Credits Icons: Oliver Geith
Lockscreen : Hide clock for DeskClock

Hide statusbar clock if chronus or the DeskClock widgets
are being displayed

Patch-set 2: This will work also for Chronus
PatchSet 3 : Fixed compatibility with Chronus

Change-Id: Ife7db4521d349d221e48ac53b9d2d0a1ebaadce3
StreamingZipInflater: fix mmap'd end of read

When reaching the end of a mmap'd segment, it was erroneously trying to
read more data. This is because we were reading data one character at a
time, so we never reached the Z_STREAM_END result without going through
the loop once more.

Bug: https://code.google.com/p/android/issues/detail?id=39041
Change-Id: I6c53b8187384a42217c32112d6a0c2857f471109
Account malloc mmaped pages as native heap.

Currently when malloc uses a page rather than brk the heap gets accounted as
ashmem memory. Previously the memory would be accounted as unknown but since
[1] it gets accounted as ashmem. This change makes the accounting see this
memory as being native, ie the same kind of memory we associate with brk.

[1] https://android-review.googlesource.com/#/c/49583/3

Change-Id: I6f496cfeb590268d41d8e047b12cd5c90359e2b0
Fix ListView is not scrolled properly with arrows

According to ListView's layoutChildren logic, it detaches all children
and rebuilds its children based on visible area which might omit
invisible elements in the adapter.

In this case, arrowScroll methods only tries to find next scroll
candidates from its children so user is unable to scroll more with
D-pad.

This fixes the issue by look forward next child among the adapter as
well as children.

Bug: 7346868
Change-Id: I01ab19ad899b5bcb5ab420ddf08c9ffd136933d1