[android] Add Android TV support

Add Android TV support. This simply means adding an entry to the TV
launcher.

Tested on ADT-1 Android TV device.

Video playback seems to work fine, audio playbacks work with stereo
PCM and basic passthrough. A separate commit adds 5.1 PCM support.

There are two significant issues that I saw:
- crash on exit, looks like double free at /system/lib/libmedia.so
  (android::sp<android::AudioTrackClientProxy>::~sp()+10),
  maybe something to do with threading? or just an Android bug...
- a warning flood on playback of many videos:
  W/art: Attempt to remove local handle scope entry from IRT, ignoring

Both of these look like either general issues introduced with Android L
and/or ART, not Android TV specific issues (but I did not confirm that).
[android] Declare touchscreen as unneeded

We do not require touchscreen (though we can use it). Declare it as not
required in the manifest (it defaults to required as per documentation).

This is mostly cosmetic at this point, since it mostly affects Play
Store filtering, but it does not hurt to have the manifest correct.
[configure] use central version.txt file to store Kodi name, and add it to GuiInfoManager
[log] use APP_NAME from version.txt file for log header
[win32] create executable ProductName/CompanyName properties from version.txt
[libs] Remove superfluous freetype version/project from the tree.
[android] Add 5.1 PCM playback support

Tested on ADT-1 Android TV device.

This commits add code for supporting arbitrary channel layouts with the
AudioTrack API. However, at least on ADT-1 any non-5.1 layout gets
downmixed to 2.0, so add a compile-time define for limiting playback to
2.0 and 5.1 (so that e.g. 4.0/5.0 content is played back as 5.1), at
least for now (i.e. until a device with support for non-2.0 non-5.1
appears).
Merge pull request #5187 from ace20022/remove_freetype

[libs] Remove superfluous freetype version/project from the tree.
Merge pull request #5082 from anssih/android/pcm5.1

[android] Add 5.1 PCM playback support
Merge pull request #5083 from anssih/android/tv

[android] Initial Android TV support
[pvr] remove the "All recordings" folder in favor of a "Group Items" option in the side blade
[confluence] adds 'Group Items' button to the PVR sideblade menu
[pvr] adds missing control id constants for sort buttons
Merge pull request #5175 from MartijnKaijser/appname

Make it easier to rebrand from a single file
[keyboard] adds code for loading keyboard layouts
[keyboard] adds keyboardlayouts.xml
[keyboard] settings for keyboard layouts
[keyboard] changes to GUIDialogKeyboardGeneric for layouts
[gui] bump skin version to 5.3.0, remove backward compatibility code in the keyboard dialog as changes are no longer BW compat. Version 5.0.0 skins will still load, but should be updated to 5.3.0 in preparation for Helix
[confluence] adds support for keyboard layouts to confluence.