server: start cne service

Connectivity Engine (CnE) provides advanced network selection per socket,
reduced signalling traffic, and increased power savings.
The service implements the interface defined by CNEManager which Android
applications may use.

Change-Id: I9ffd1f5d60f5e9e185ab482a35b3b07f29a4124c
(cherry picked from commit 3a4e3ba1bc67c460ec3c2fd4ef169ae25e3e69b1)
(cherry picked from commit 1bb0036652318ac8bbecf3e6c810bbc779387c61)
(cherry picked from commit 3c8af4a2546d9b71d113072d680107cb56651e71)
(cherry picked from commit 861a4b062196020bf24a5b3731c717b5b95a7d77)
(cherry picked from commit e3dba9799892f13c5bc2376b81cf5dceae17492c)

Add Connectivity Engine (CnE) WQE support

Enhanced connectivity features viz. Wifi Quality Estimation.
Supports dual network mode - wifi & mobile simultaneously.
Use QcConnectivityService when CnE is enabled for all CnE features.

Change-Id: I14b02e21515bfc1b5fd2fc4f28e5190fa80f83f8

server: Initialize ConnectivityService on low memory device

Skip initialization of QcConnectivityService and
use ConnectivityService.java for a low memory device

CRs-Fixed: 531430

Change-Id: I2111ec32f6e40ca79b7fc91ec4cef97ac27f3b3a

Update CNE feature values.

Start QcConnectivityServices for the new
application traffic profiling feature too.

Change-Id: I52ae76420ebd098d43fe0663f41ce622a407b90e

connectivity: allow inheritance to subclass

set modifier to protected in order to allow
subclass to use the same data and avoid redefinition.

Change-Id: I2dc688d3e433775cb073ec6faae3981807212cc9

Change visibility of methods

Change the visibility of some methods so that
they are accessible to the child class.

Change-Id: Ie1a45978b42742cac0aaedba29fb2375882c0ae4
CRs-Fixed: 611347

Conflicts:
	services/java/com/android/server/SystemServer.java
Add the calling package name to requestRouteToHost

The calling package name will be used to check if an application is a
system application when deciding if a route should be exempt from VPN
routing rules...

Bug: 12937545
Change-Id: I2c09c875fe9bb9685871a0a801ddcbb32fc17405
Only allow System apps to make VPN exempt routes

requestRouteToHost will only allow system applications to make routes
exempt from the VPN's routing rules.

If a VPN is currently running and a non-system app requests a route it
will only succeed if that host is currently covered by a VPN exempt
routing rule. Otherwise it will fail.

For example, if a VPN is running and the MMS network is brought online
those routes will be added as VPN exempt. If an application then tries
to request a route to a MMS endpoint it will succeed because the routes
already exist. If an application tries to request a route to a host
covered by the VPN the call will fail.

Bug: 12937545
Change-Id: If7bcec91bbb96c62c8fb69748c975847e6c00b6f
Connectivity: Set TCP delayed ACK and User Configuration Flag

Provide a Mechanism to set tcp delayed ack settings from
Connectivity Service. The tcp_use_userconfig flag is set to
override the default tcp delayed ack configuration in tcp stack.
tcp_use_userconfig flag is reset when the TCP stack is required
to use default delayed ack settings. Currently the delayed ack
settings are overridden for Wifi and LTE networks only. Other
network types continue to use default delayed ack settings

Change-Id: I282ef0f6b6278b6efcef3870242974f7ee93e508
CRs-Fixed: 628139
services: change default sampling interval to -1

Change default sampling interval to -1 to avoid sampling to resolve
power consumption issue. Original implement will keep UE wake up every
12 minutes, which will cause issue when doing power standby test.

Change-Id: I018e22a44259e94bce87ceaf04ff523f035183f8
Update LinkProperties with MTU value

Use the MTU provided by network as part of Data Call Response.
If it is not present, use the static value from config file

Change-Id: I9d03cc9b355d09a93883fbf4ddc93fae0077641c
CRs-Fixed: 634747