[2/n] Camera Compat UI: Add interfaces for client-server communication.

Changes:
- Listens to changes from the client coming through IActivityClientController#requestCompatCameraControl to ActivityRecord#updateCameraCompatState
- ActivityRecord#updateCameraCompatState sends updated state via TaskInfo to WM Shell
- ITaskOrganizerController#updateCameraCompatControlState to dispatch the user interactions with the control from WM Shell triggers callback to ActivityRecord#updateCameraCompatStateFromUser
- ActivityRecord#updateCameraCompatStateFromUser remembers the user's choice and asks client to apply treatment through ICompatCameraControlCallback

Feature is guarded with config_isCameraCompatControlForStretchedIssuesEnabled

Test: atest WMShellUnitTests:ShellTaskOrganizerTests, atest WmTests:ActivityRecordTests
Bug: 206602997
Change-Id: I083aa6718bd67456bedd9444e9b78740c041f870