Camera: Mark streams unpreparable when using HAL buffer management

With CameraHal buffer management enabled there is a window of
opportunity where camera clients will be able to prepare streams
that already have submitted capture requests. Depending on timing
if the client is able to trigger prepare immediately after
submitting a capture request, then CameraHal might not be able to
request a buffer quickly enough and the prepare operation will
succeed which contradicts the public API guarantees.
To avoid this, mark the requested stream as unpreparable before
sending the request over to CameraHal.

Bug: 162884320
Test: Camera CTS

Change-Id: If9678fe440a5fbf12a6b2e424b9e63dd40d91fa8