KeyguardViewMediator: Play lock screen sound sooner

When the screen is locked, there is a long pause before the lock
sound actually plays.

This makes that sound happen much sooner.

Also modified Lock.ogg slightly to remove the initial silence.

Change-Id: Iede7a5d22291d1ada98800d2b380c255547df61d
SystemUI: Remove obsolete layout params (fix lint warning)

Change-Id: I41f688c9a351189c9929dc1f4947c0124820f5ad
SystemUI: Ignore lint check ProtectedPermissions

Change-Id: Idf8ccd37cfb02e6da136187eb872e97e22b158e6
Scroll: modified velocitytracker

Velocitytracker and overscroll are called on every touch event to
calculate if there is a scrolling/fling. Move this and the recycling
to static voids so they are pre-optimized at compile time rather than
after evoking the method call during runtime (JIT) to increase responsiveness.

-Vanir

Change-Id: Ic7351da58f29281ca2b6a788386b95b68b552390
Avoid IndexOutOfBounds Exception in ActivityManagerService

1. finishActivityLocked() doesn't give guaranty to remove only
   one ActivityRecord from the history stack.
2. Unfortunaly if our topRunningActivity is top of the stack,
   then there is potential IndexOutOfBounds Exception in
   ActivityManagerService.
To avoid it, we can just traverse to the top of the history stack.

Change-Id: Idf06356e643789ccfd493d7097278cea44bdf395
Don't ANR when no windows are touchable.

If the user touches a portion of the screen in which all of the windows
have FLAG_NOT_TOUCHABLE set, handle this as a failed event injection,
so that it doesn't result in ANR.

Change-Id: I6437e3dd1641005b8ac80f6cf7d20b14b97fcc7b
Make ActivityManagerService.systemReady thread safe

During boot of the framework, two threads execute code in
ActivityManagerService and ActivityStack, respectively. At one point
in time, the latter thread checks the internal state of the first
thread, but if for some reason that thread has stalled for an
unexpected amount of time, the state has not been updated (yet).

An example of the above is when one of the services started from
SystemServer (eg AppWidgetService) takes unexpectedly long to start.
This causes the framework to boot without broadcasting
BOOT_COMPLETED, which in turn has ramifications for the entire
system.

Change-Id: I14b5f6fcb320be01596a2e04db3f724a43f4fbe1
Fix a copy/paste typo in ViewPropertyAnimator

Change-Id: I149351f062e874fc11da61f416da5cfa5b1cb444
Reduce EntropyMixer seed size from 4096 to 512 bytes.

The suggested seed size from Linux drivers/char/random.c is 512 bytes
rather than the 4096 bytes currently used.

Change-Id: I3dd55105f0a95ce9cda34b4cf08987b8a28c4ac9
Make EntropyMixer mix in output of Hardware RNG into Linux RNG.

On devices with Hardware RNG (HW RNG), this makes EntropyMixer
periodically (every three hours) read 512 bytes from HW RNG and mix
them into the Linux RNG.

This is done without increasing Linux RNG's entropy estimates to
avoid having to trust the quality of the HW RNG. This approach cannot
reduce the quality of the Linux RNG output, but may increase it.

Change-Id: Ifde851004301ffd41b2189151a64a0c5989c630f