Fix timeout on search without LDAP. Liblinphone waited for not ended plugins while there were not requested for the search.

- build: 1 day
- test: 1 week
- package: 1 week
- deploy: 1 week

liblinphone: Improve conference tests reliability by waiting that all participants reach the Present state

Allow applications to create audio video conferences with a chat
capabilities. The lifespan of the chatroom is the same as the
conference, i.e. it gets read-only as soon as the conference ends

Do not add text parameter anymore when creating a conference with chat
capabilities but rely on custom headers

    conference manually, the conference focus is called as soon as the
    client adds the first participant. As the application is also allowed to
    pass a list of calls, the core attempted to call the focus for every
    participant

Updated liblinphone to add a wake lock in Android Platform Helper while processing a push notification

Updated CardDAV implementation in liblinphone to use Core's C++ HTTP client, added a magic search plugin structure & reworked LDAP to use it

 - set listeners are weak pointer
 - remove call from the core call list once it gets to the Released state
   in order to avoid deleting the last reference and the shared_ptr being
   destroyed

timegm takes into account the offset to GMT if tm member tm_zone is set
therefore no need to apply offset

- Clearing EKT data when participant list is empty
- Removed publish name header check

Add test to verify the it is possible to handle the scenario where the 401 Unauthorized message arrives after the 180 ringing

participant' by waiting that the core have the expected number of
participants

LDAP improvements: forward openldap logs to liblinphone debug log, and use our own resolver by default to avoid blocking getaddrinfo() in openldap.

NOTIFY has been received.

    ClientConference and ServerConference classes
    Participants added by REFERs are Speakers

package. It will prevent to guess the organizer when a participant joins
a open conference without having received the ICS

LIME: fallback to local address of the conference ID of the chatroom if the account hasn't registered yet when encrypting outgoing messages

    - use C public API methods in c-chat-room-params.cpp
    - create chat room using new API in tests

Fix crash in linphone_call_take_preview_snapshot() while stream is send-only - previous commit labelled the same way was accidentally lost because of source code conflict.

LIME: fallback to local address of the conference ID of the chatroom if the account hasn't registered yet

Tester:
- Set no RTP timeout to 6 as minimum value to avoid false positives due to small delay in receiving RTCP packets
- Stabilize test "Video conference with no conference version" on overloaded or slow networks