[1/2] add to support pause/resume download

We add pause and resume API here so that application can
pause and resume downloads manually by DownloadManager.
This contains two points:
1. add pause and resume download APIs.
2. add another paused reason for this download status.

Change-Id: I606b48ca20f43bcc6c119683818c2ab6ff03bfe5
Fix setSurfaceTexture to handle surface caching

Changed the TextureView.setSurfaceTexture to apply the
existing listener to the surface provided in the method.
This is done to allow surface caching to work.
Whenever a new SurfaceTexture gets created, its listener is
created as well, so when the setSurfaceTexture is called
we should be attaching the listener to the new surface.

Change-Id: I4c1a704c587e977ab7a6b1fe3a7d3e0d20d00218
CRs-Fixed: 639136
Mark constructor as accessible in LayoutInflater.

Needed to bypass new access checks for fields, methods, and
constructors.

Change-Id: I8ff0b44a6cb4f4af1c72734bca366d8b89528030
[ActivityManager] Fix a bug: unable to start activity after starting activities during screen off.

Symptom: Unable to start any activity.
Root Cause: ActivityStack.mPausingActivity() points to a destroyed activity of a died process, so that ActivityStackSupervisor.allPausedActivitiesComplete() always returns false.
Solution: Set mPausingActivity to null in ActivityStack.cleanUpActivityLocked().
Reproduce steps:
    a. Turn screen off.
    b. A background service starts an activity X (in process X).
    c. A background service starts a no-history activity Y (in process Y), but the main thread of Y was blocked.
    d. A background service starts Y 3~4 times --> this causes am_failed_to_pause on X.
    e. Main thread of Y is freed finally --> this causes Y crash for android.view.WindowManager$BadTokenException.
    f. Turn screen on, X is shown on screen, but neither back key nor home key can work because mPausingActivity is Y.

Change-Id: I320b3db407e2d4cc745c8ca22a6e548742234242
[ActivityManager] Reduce report ANR on wrong activity.

Symptom: ANR report on wrong activity.

Root Cause:
  KK changed resume behavior that will not update focus when only resume,
if the activity blocked, it may report ANR on previous focus.
  By original concept, it will try to correct the ANR target,
but the stack of waiting(waitingVisible=true) activity may
different with current top stack.
  If it gets key dispatch timeout, mResumedActivity and mPausingActivity
of its stack will be null becuase it is not top stack.
Then it is unable to change ANR target to the real no response activity.

Solution:
 Use focused stack to get the real culprit.

Reproduce steps:
1.Launch an Activity X from launcher, press home key.
2.Launch X from launcher again, X blocks(sleeps 15sec) in onResume, press back key in the beginning of blocking duration.
3.ANR dialog shows launcher is no response.

Change-Id: I99416ad91e349096f995990f2240a97616fbaf28
Always call super.onCreate().  Always.

Bug 12991134

(cherrypick of commit 9d6376a1d88ab5b3a41ee4400e3aaa4c4ee69e2a)

Change-Id: Ife16ef93408253e3318a06dc0206ab4b88c7f367
Marquee text RTL improvements

Changed marquee text to scroll according to
the reading direction. Arabic text will
show the right edge and scroll towards
the left edge and vice versa for Latin.

Corrected marquee flicker when scroll animation
finished. The ghost scroll's x position was cast
to int and it made the text flicker when
marquee stops.

Ghost part didn't display for RTL languages.
Added multiplication with
getParagraphDirection to negate the ghost
offset.

Change-Id: I689039118df01a62f73ef0079c857fea1bfcc5a0
fix WRITE_SETTINGS to be "dangerous"

(see http://www.fireeye.com/blog/technical/2014/04/occupy_your_icons_silently_on_android.html for an explanation why this is dangerous)

Change-Id: I8f938dc4f528aa2ccbca3d4cec235feb0299c0bd