Expose complex item names in a way useful for custom builds

Auto Stream Discovery

Expose complex item names in a way useful for custom builds

Plan: Support custom build override of available complex items

Updated MAVLink to handle video stream types (auto discovery)

Support custom build override of available complex items

Camera Calc: Incorrectly setting valueSetIsDistance to false

Fix valueSetIsDistance when manual camera change

Better defaults

FW Landing Pattern: Scan fixes

Better handling of guided map indicator show/hide

Scan fixes

Move GStreamer dependencies (Android) to S3

Hide guided map indicators when vehicle goes away

Better show/hide behavior of guided map indicators

Add gotoFlightMode method

Map Indicator confirm/cancel support

Cleanup unused code

Add gotoFlightMode property

Various fixes

Handle crash on first time switch from disable to enabled
Handle video settings restore after disabling Taisync

Taisync support

# Conflicts:
#	QGCCommon.pri

Moving Android to GStreamer 1.14.4

Off my own server during tests