* Add 3DR Solo, Parrot Discovery video sources

* New solo video handshake, remove stale code

* Allow use of AutoConnect and HighLatency options for most link types.

* Remove isAutoConnectAllowed and isHighLatencyAllowed methods and assocated Q_PROPERTYs from LinkConfiguration class.  Allow user to configure these properties on all link types.

* Fixed 5.15 build on Andoid (removed deprecated API)

* Removed -nostdlib++ hack fix

* APK build error fix

(cherry picked from commit 2faa80dacfa726f1ece6720934e5b5f81ca4b754)

(cherry picked from commit 4b73b4a49f542e2e051da6ee50e54f7fe06a13b1)

* Use correct key names

* Rewrite FTPManager

* Fix Reset Session at end of download

* Fixes for metadata download

* Remove unneeded mutex

* Cleanup LinkInterface, fix connect/disconnect bug

* Clang 12: Fix Autopilotplugin compile warning

* Clang 12: Fix Vehicle CompInfo compile errors

Co-authored-by: huangjian <huangjian@cuav.net>

New VehicleLinkManager implementation

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

function "QLineF::IntersectionType QLineF::intersects(const QLineF &line, QPointF *intersectionPoint) const" was introduced in Qt 5.14, and QLineF::intersect is obsolete.

see also:
https://doc.qt.io/qt-5.14/qlinef-obsolete.html
https://doc.qt.io/qt-5.14/qlinef.html#intersects

Co-authored-by: Anton Erasmus <antonerasm@gmail.com>