(1) Define a new intent action ACTION_ONE_HANDED_SETTINGS in Settings

to support long-pressed action for One-handed mode tile

Define a new intent action ACTION_ONE_HANDED_SETTINGS in Settings for
showing One-handed mode settings page when long-pressed on One-handed
mode tile

Bug: 201743873
Bug: 202132480
Bug: 207381742

Test: manually test One-handed mode quick settings tile long-pressed
action.
Test: atest SystemUITests

Change-Id: I6becc5761de3d2ccdf2057793068832d886cf338