Fallback Home doesn't restart on keyboard change

Fallback Home gets launched multiple times due to
CONFIG_KEYBOARD_HIDDEN, which is irrelevant for it. So we mark the
activity to not be restarted on this config change.

Test: manual
Bug: 215439232
Change-Id: I558091979840a6b664e39f6b8bd22957d1b2b729
1 file changed