Settings: Add preference for one shot auto-brightness

Author: Eamon Powell <eamonpowell@outlook.com>
Date:   Sat Aug 28 13:17:21 2021 +1000

    fixup! Settings: Add preference for one shot auto-brightness

    * Strings belong in cm_strings.xml
    * Fix inconsistent capitalization in comments
    * Fix missing & unnecessary newlines

    Change-Id: I9c2c6b8a68ec921ab69a7d3ee19e907c58533823

Author: Eamon Powell <eamonpowell@outlook.com>
Date:   Thu Aug 26 18:22:15 2021 +1000

    Settings: Adjust one shot auto-brightness strings

    The current strings provided are confusing and lack
    clarity regarding what the feature actually does.

    Change-Id: If87fad1e163131e7b9a070f6866f7d564e368cca

Change-Id: I57f11ad4e8fc47b2ff2c771e61920780e359815f