Miscellaneous Android fixes and improvements

[Peter Bennett]

Android support is taking shape. Here is a list of issues to look into, with emphasis on Nvidia Shield / Android TV:

• Exit from frontend causes a SEGFAULT.
• The first startup hangs on white screen. Needs a splash screen?
• Second startup hangs trying to locate the Myth Backend. Perhaps UPNP is not working? I solved it by manually creating the config.xml file. Check what is going on and if necessary set up the best way of doing this.
• The shield remote does not have enough buttons. Add appropriate OSDs or menus to support all functions with the limited buttons available. Fix the bahaviour of the back button.
• Support for Game controller buttons does not work correctly.
• Green line at the bottom of the screen when watching video.
• Digital audio is not working. There is only one audio device in the list, OpenSLES and setting up digital audio causes strange behavior.
• When MythTV goes into the background, it should enter standby mode.
• Remove Xvideo playback profiles that will not work.
• Ensure default theme painter uses OpenGL.
• Support hardware accelerated decode.
• I noticed a white flash sometimes when navigating screens. Maybe the default background should be black not white.
• If Android needs to terminate the app while it is in the background, make sure that is handled cleanly.

Issues for Android Tablet and phone support:

• better tablet/touchscreen support.
• My screen map probably should have a transient overlay guide
• better gesture support.
• proper list flick scrolling