Remove references to using visual editors and use the example code
from Qt Sensors module.
Add instructions for using CMake.
Add CMakeLists.txt, AndroidManifest.xml, and Info.plist files.
Change-Id: I956379fdf7d39161f571893d56250ec2dd2f5ddd
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>
