[2/n] Create compat ui education status

Store the state of Compat UI education in Settings
to allow other application to be informed of their
state.

Flag: com.android.window.flags.enable_compat_ui_visibility_status
Fix: 350953004
Test: atest WMShellUnitTests:CompatUIStatusManagerTest
Test: atest SettingsProviderTest:SettingsBackupTest

Change-Id: I01c360ff08c090a3be94ebe6c0c85a5f8a8098a7