so-connman is for implementing connection manager features.
The APIs should be implemented in Zephyr, connman and so on.
To connman, the connman D-Bus APIs are wrapped in the so-connman
APIs. The user can use the so-connman APIs to control connman.

To invoke the D-Bus method of connman, the async call is used,
the callback function is set to get the results of async call.

The basic so-connman APIs are in the patch.
It provides the APis of getting the name, ip address... of services.
The service connect/disconnect APIs and set/get offline
are implemented too.

The further sol-connman APIs are being planned.

Signed-off-by: Wu Zheng <[email protected]>

Get the service properties APIs are implemented.
It based on connman and wraps the D-Bus APIs of connman services.
Get the name, state, type, ip address ... of services are done.

Signed-off-by: Wu Zheng <[email protected]>

sol-connman init/shutdown are implemented.
It based on connman and wraps the D-Bus APIs of connman.
init/shutdown are not true to init/shutdown sol-connman.
init_lazy/shutdown_lazy are true to init/shutdown sol-connman.

Signed-off-by: Wu Zheng <[email protected]>

sol-connman set offline are implemented.
It based on connman and wraps the D-Bus APIs of connman.
It sets the connman to offline mode.
It will close the all connection interfaces(including ethernet ...).

Signed-off-by: Wu Zheng <[email protected]>

Get connection manager state is implemented.
It based on connman and wraps the D-Bus APIs of connman.
Get connection manager state are from connman.
It includes online, ready, offline, idle.

Signed-off-by: Wu Zheng <[email protected]>

Get services properties is implemented.
It based on connman and wraps the D-Bus APIs of connman.
It only is invoked internal and in the process of init lazy.
Get services properties APIs can't invoke the D-Bus APIs of connman directly.

Signed-off-by: Wu Zheng <[email protected]>

add/del monitor are implemented.
It based on connman and wraps the D-Bus APIs of connman.
Monitor the connman services and connection manager state changed.

Signed-off-by: Wu Zheng <[email protected]>

callback are implemented.
It based on connman and wraps the D-Bus APIs of connman.
When add Monitor, callback function is registered.
when any services properties and connection manager state are changed,
the callback function can be invoked to notify the info.

Signed-off-by: Wu Zheng <[email protected]>

Network devices connect/disconnect are implemented.
It based on connman and wraps the D-Bus APIs of connman.

Signed-off-by: Wu Zheng <[email protected]>

Get services list are implemented.
It based on connman and wraps the D-Bus APIs of connman.
The user can use the API to get services list.

Signed-off-by: Wu Zheng <[email protected]>

Add sol-connman to compile files, so that sol-connman can be compiled.

Signed-off-by: Wu Zheng <[email protected]>

The test cases will test sol-connman APIs

Signed-off-by: Wu Zheng <[email protected]>

The init and shutdown process of sol-connman need add to the
init and shutdown process of sol-comms.

Signed-off-by: Wu Zheng <[email protected]>