[Action Corner] Get action from settings

Get action from settings and convert it to action type for each action
corner. Read the action type in ActionCornerInteractor when action
corner is active.

Bug: 397182595
Flag: com.android.systemui.shared.cursor_hot_corner
Test: ActionCornerSettingRepositoryTest
Test: ActionCornerInteractorTest

Change-Id: I1e94e9a1d7b4865bacd08b30b890d8b6ae65fc04