Add ATV target for all architectures

[supechicken]

Revisit of #7 which works 😅
Closes waydroid/waydroid#1189
Closes waydroid/waydroid#554

This PR adds a TV target for all architectures, which uses ATV configs from LineageOS and has a TV version of system apps (launcher, settings, etc).

The new target is named lineage_waydroid_tv_<arch>-<variant>

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Some minor things are broken and require a patch to fix them (will open another PR in android_vendor_waydroid once this is merged):

• The built-in keyboard doesn't work by default (although re-mapping the enter key to DPAD_CENTER fixed it, patching LeanbackKeyboardController.java directly will be a better option)
• Developer options tab crashing (fixed by patching the updateUsbConfigurationValues() function)

[supechicken]

@aleasto Do the latest changes look right to you😅

[aleasto]

Have you considered whether this could be a build-time flag rather than creating a new product? So that the vendor could be shared, presumably.

[supechicken]

Have you considered whether this could be a build-time flag rather than creating a new product? So that the vendor could be shared, presumably.

Putting them in a separate target would allow us to set ATV specific build flags without using if statements in the future (but I am okay with making it an environment variable/switch for that)

[aleasto]

can system.img and vendor.img mix product names? I.e. can you use the "official" MAINLINE vendor image with this system target?

[supechicken]

Yes, it also boots with the official OTA vendor images, but the product name set in vendor.img will have a higher priority (PRODUCT_MODEL does not have any effect when using OTA vendor image)