navbar: fixes and drawables

fix FC when back key isn't in the user config and IME is up -> closed
add reboot menu,
add screenshot,
add screenrecord (disabled until drawables are made),
remove some unused drawables

Change-Id: I6bf8bcfb7f46a755c16a07a6d26187d21b41f2dc
Merge "navbar: fixes and drawables" into kk44