Issue: #79814
Change-Id: Ie1ba9208e5eaa69387fcda818384d5878f36b6d1

Refs #74812

Change-Id: I2587debb5e4c1584f94370edb36ad87b28fc6c92

Refs #69972
Refs #70084

Change-Id: I152468471b02ff3b118c083cd285786e9e286fcc

Mimicks vlc-android architecture

This commit introduces user-friendly feedback for security.
Not fully functionnal yet

Refs #40232

Refs #40939

Integration of new security features implies modifications in call handling.
By default, when handling a call,  a SipCall object is created, but if ZRTP hooks
are activated, the call is dynamically subclassed, and becomes a SecureSipCall.

Refs #40939

SipCall keeps track of its security state, and store its SAS if needed.
This commit also introduce two new Fragments wrappers, for accounts and calls.
These wrappers reduce code duplication between fragments requiring hooks on daemon
signals.

Home interface now only have one list to display conferences (renamed conversations)
There are still some issues with conference mapping client side.

Android contact id is retrieved from the history database, and is linked to the
history view.

History is now stored in a lightweight ORM database.
Corners cases are still not treated, but simple calls are saved properly.

Every call is considered has a Conference, holding one or several SipCall.
This simplify extraction and storage of calls in history. It also provide a unique interface
to handle calls instead of two (which were SipCall and Conference).

This commit impacts the whole structure app, because we now have
nested Fragments. To keep retro-compatibility, we switched from normal
Fragment to Fragment from the support library.

* #25117 Refactor and stability

* #26286 conference creation/suppression working

* #26250 design updated

Small refactoring on SipCall

* #25116 SipCall redesigned, holding list of contacts (android or unknown)

* Deleted unused classes

* Modified Fly-in menu layout
* Added SearchView in ContactList handle

* #23415 Small fixes
* #23697 Implementation of hold/unhold a conference -buggy