Dispose of obsolete streams when the session is re-configured.

This follows the documented AIDL requirements how to handle
repeated configure calls.
Clearing the stream map will also free / unmap all referenced
buffers.

Bug: 301023410
Test: atest virtual_camera_tests
Test: OpenCamera
Change-Id: I8deab62562b8e2a5973ebfe2bcc5399de1d056da
3 files changed