Including the Xamarin.Android.ManifestMerger solved this issue for me: https://www.nuget.org/packages/Xamarin.Android.ManifestMerger/1.0.0-preview03 (View Post)
I didn't but there are new threads on this (the only suggestion from me to you is doing a custom renderer and implement the gestures): https://forums.xamarin.com/discussion/18798/detect-long-tap-on-l… (View Post)