Fix shared stream leak in camera2 shared device

This change fixes two issues:
1) shared stream leak
2) bug discovered in matchClientRequest for shared device client

Flag: com.android.internal.camera.flags.camera_multi_client
Bug: 391456220
Test: run CTS test SharedCameraTest#testSharedSessionCreationDifferentStreams
Change-Id: Id014f99678112ff669e0440de50bfc3c6cc0f6e4