Sensitive notification content protection for apps

Create component that monitors for:
- notifications with sensitive content
- media projection start/end

Apps will have secure window applied.

Flag: ACONFIG com.android.server.notification.sensitive_notification_app_protection DISABLED
Bug: 312785095
Test: atest SensitiveContentProtectionManagerServiceTest
Test: atest WindowStateTests
Test: atest WindowManagerServiceTests
Change-Id: I84a4d0dfaa26109ac82db0899f37c30912a6cc14