Trigger texture update on each submission of input buffer.

When input queue is full (which will happen if there are
no capture requests coming from the camera client), it blocks
until there's buffer freed up.
This is not desired (for example, it causes video decoder
attached to the virtual camera surface to drop frames), and
causes that the subsequent capture request received by camera
won't get the most recent image from the virtual camera owner.

This cl fixes this behavior, by consuming the buffer from
the input queue immediatelly after it's submitted.

Bug: 344572859
Test: atest VirtualCameraCaptureTest
Change-Id: Ic7556921630d56f73bbd861d35c5218351217ee6