frameworks/base: Fix to avoid UI freeze issue.

Due to some race condition in WindowManagerService, Screenshot
layer remains as topmost and buffers are not flipped hence
no updates seen on the screen. So, trying to destroy persistent
layer explicitly if freeze timeout expires 6sec.

Change-Id: Ibe295550a7431a4f633a57e7dfab0cbda102ab87
MediaMuxer: handle expection for add track

Native addTrack call throws IllegalArgumentException on failure.
Catch this exception in MediaMuxer and throw IllegalArgumentException
that calling function can trap.

Change-Id: I97239ee2272c754ef6d7d54c5a27d1889ac01b80
SystemUI: Remove unnecessary mobile data activity icon update

The unnecessary mobile data activity icon update causes activity
icon is 0 when mobile data is not actually used. As a result, data
icon will not show even if data connected.

As mobile data activity icon has updated in updateDataIcon, do not
update it again in refreshViews. Remove unnecessary mobile activity
indicator icon update.

Change-Id: Ib39c55a39a0623cc9a2d14508d487f86e3a0f82f
CRs-Fixed: 745386
SystemUI: Set zen mode to no interruptions if silent mode is set

When setting ringer mode to silent and current zen mode is off, zen
mode will become priority interruptions mode. As a result, ringer mode
is set to normal mode in updateZenMode.

Set zen mode to no interruptions when ringer mode is set to silent.

CRs-Fixed: 744813

Change-Id: Id104e5473d0e8d624b06dfc9e5dbd8d9f7627b6e
SystemUI: Fix task manager title not change with language issue

When system language changes, task manager title and kill all button
name do not update.

Set task manager title and kill all button name when refresh task manager
view to ensure they change with system language. Rename task manager tile
to meet multi language requirement.

CRs-Fixed: 741079

Change-Id: Ic247c2a70cd63ccb87fd2f3bea05196e28060857
SystemUI: Fix sim pin lock message displaying incorrectly issue

When verify password successfully and no sim card is pin locked,
getSimPinLockSubId returning invalid sub id causes slot name
displays incorrectly.

Do not update sub info if sub id is invalid, remove inappropriate
security message update to avoid displaying incorrectly.

CRs-Fixed: 737973

Change-Id: Ic4c4aca09456008c72677aedd9caa6af9e84da8f
VideoView: Check state before calling suspend

Only call suspend under certain states. There is a possibility
that when activity is finished, pause gets called before destroy
calling suspend and stop on mediaplayer respectively. This will
result in stop failure as it has already been suspended.

CRs-Fixed: 750459
Change-Id: I34c24d6abe3726b163f9a582d73b31dfd4094e44
Allow override of DUN settings

Allow override of system DUN settings by setting
persist.sys.dun.override
to one of the following values:
2 = not set, 0 = DUN not required, 1 = DUN required
If the prop is not set or is set to an invalid value the system setting
will be used.

Conflicts:
	services/java/com/android/server/connectivity/Tethering.java

Change-Id: I296f303a23351e4ab29898895abfcd313c747db9