Added three ApiDemos for secure surfaces. One for Activity, one for Dialog and one for SurfaceView. The mechanism is the same in each case but the API is a little different. Bug: 7368436 Change-Id: I78bc2a456b4c0f1a553120d72f433095ba7e038c
Adding a new folder in development/samples is not enough to have it be packaged with the SDK. Make sure to edit development/build/sdk.atree to add the sample to the SDK build.