[4/n] Camera Compat: Add strings for toasts.

Added strings will be used for two toasts shown:
- after the system rotates the screen for camera compatibility
- when a camera view is started within the app that may not be able to display the camera preview correctly while in split screen.

Bug: 255939392
Test: build works
Change-Id: Icea6f6e0442dcc2a8a27632c20cfe8c64187f651