+ recv bandwidth estimator uses only OrtpBwEstimator

Build bcg729, bcunit and bzrtp statically for iOS.

Add CMake options to choose if we want to build each BC projects as static or shared libraries independently.

Do not start media loss check timer if no rtp timeout is 0 + fixed AccountParams::setOutboundProxyEnabled(false) not saved to config file

Reduce processing threads on VP8 to avoid excess thread numbers (unfreeze Windows and Mac on video processing)

Refactor CMakeLists.txt to minimize the use of external projects and include dependencies as subdirectories instead.

Update gitlab-ci files to take the CMake changes into account.

Add sequential builder in gitlab-ci.

Add build for Raspberry PI.

Fix build for UWP and Windows Store.

Simplify inclusion of TunnelClone.

Add preset to build for Windows using Ninja.

Remove no longer needed cmake-builder submodule.

Update the README.md file with the new CMake usage.

Update submodules.

The patch program is no longer needed to build the SDK.

Do not create dangling symlinks in the bc-dev-centos7 docker image.

The pkg-config program is no longer needed to build the SDK.

Disable fatal warnings for mbedtls build by default.

Update submodules for uniform CMake targets naming.

Rename CMake presets to add a "-sdk" prefix for presets generating an SDK.

Rename testers in gitlab CI jobs according to CMake targets renaming.

Some directory fixes in gitlab CI jobs.

Update submodules because of rebasing.

Remove...

if possible.
If a core supports IPv6 and IPv4 addresses, the answered will look at
the offerer IP address family and it will set a media server with either
IPv6 or IPv4 address depending on the offerer choice.

Feature to get account creation token: - 2 callbacks for async requests to obtain request_token and token. - 2 functions on FlexiAPI to make server requests.

Updated liblinphone to fix issue on Android when core.enableAutoIterate() is called manually right after Core creation

- and msRecorder

Add test to verify behaviour of IMDN received for unknown participants.

Improve reliabability of chat message participant state Displayed:
- set sender state to Displayed as soon as the message is received
- update explicitely the state of the me participant everytime the chat
  message state is updated

Updated liblinphone with a fix for an Android crash + added API to get/set register_only_when_network_is_up config property

Updated liblinphone & msandroidcamera2 to fix a TextureView leak & SurfaceTexture preview issue on Android