Added an extension method to recycle the bitmap memory in an image view.
Merge remote-tracking branch 'xamarin/master'
Fix NRE handling when NFC isn't available
added the advanced app lifecycle demos
renamed ActivityLifecycle to AdvancedAppLifecycleDemos
renamed ServiceX<T> to ServiceX_T, due to windows not liking < and >
Fix compilation errors due to ambiguous type references.

When building with $(TargetFrameworkVersion) set for Android v4.2.
[JniDemo] Build was failing for missing icon files. Added them.
Remove VS-incompatible ProjectTypeGuid
Call TexImage2d from GLUtils instead. Fixes #10668
[TexturedCube-1.0] Apply #10668 fix to the TexturedCube-1.0 version of the sample
[TexturedCube] Remove unnecessary code after #10668 fix
Add Resources.Designer.cs dependency info in DynamicTest.csproj.
Adding in a check for the GooglePlay Services.