Not including diff (dual-source) for now

This reverts commit 3053c871.

We should've done this earlier, but the code is too dependent on == for
null and undefined. Fix it later.

Signed-off-by: Danny Lin <danny@kdrag0n.dev>

Triple-equals (===) is still useful with TypeScript.

We'll replace this with a new config later.

On Pixel devices, important camera and face unlock files are located in
/vendor/media. Face unlock doesn't work at all on the Pixel 4 series
without the files.