SystemUI: Implement hide gestural navigation hint bar

Author: Jesse Chan <jc@lineageos.org>
Date:   Tue May 19 16:05:23 2020 +0800

    Implement hide gestural navigation hint bar [1/5]

    Change-Id: Ic6695dfe929db443f169d59f153e14a6de249590
    Signed-off-by: Jesse Chan <jc@lineageos.org>

Author: Jesse Chan <jc@lineageos.org>
Date:   Tue Jun 2 13:59:52 2020 +0800

    SystemUI: Set no hint overlay to highest priority

    As overlays are also used to apply navigation mode, it is needed to set
    our customization overlay to highest priority to ensure it is applied.

    Change-Id: I41ca4b7ea99fea9f62d2e8ece5114f682e8e7fe9
    Signed-off-by: Jesse Chan <jc@lineageos.org>

Author: LuK1337 <priv.luk@gmail.com>
Date:   Sun May 15 11:17:03 2022 +0200

    SystemUI: Catch IllegalArgumentException in updateHint()

    Apparently this can fail for some very unlucky users?

    Change-Id: I3609746f9b577b91525fd64f586c2e79663f9ada

Change-Id: If0230bad857e029dc82a79423ef9d3acb03e5421