Converts Immersive short lived activity to Live Card

Glass convention is that Live Cards are used for ongoing events - in this case, the flashlight being on. This allows us to use the standard 'Turn the flashlight on' voice trigger to start the live card, then tap to stop the flashlight.
Ensures USB_flashlight_Glass builds with Android Studio 0.6.1
Ensures USB_flashlight_Glass builds with Android Studio 0.8.1
Remove no longer needed DEVELOPMENT permission

This implementation uses the built in voice trigger so does not require the DEVELOPMENT permission required for custom voice triggers
Fix crash when starting live card when flashlight is not attached.
Merge pull request #4 from ianhanniballake/live_card

Convert Immersive short lived activity to Live Card