Used the WiFi slice for inspiration: ag/6793584
Also added "ambient" to the keywords, since "ambient display" is another
phrase used for AOD.
Bug: 279029717
Test: manually checked that the setting shows up when searching for
"aod"
Change-Id: I8a3a4a6635c9724565426b859722242d2bae9e49
Currently we create Always on Display slice through
AmbientDisplayAlwaysOnPreferenceController. However, as the Always on
Display is merged into Idle lock screen, the conversion won't work
properly anymore when devices support the aware sensor.
Hence, we create another custom slice for this purpose.
Bug: 145920511
Test: manual & robotest
Change-Id: Ifd90e2de5219bd4e97aa13b5855fdab95ff6c4d0