tests: Eliminate annoying and noisy CompositionEngine errors

These tests create surfaces for virtual displays, but delete the
consumer side of the BQ before they attach, causing errors in SF that
spam logs and seem confusing.

In this change, we keep the consumers around for the lifetime of the
virtual displays.

Bug: 374973152
Flag: EXEMPT tests
Test: atest
BYPASS_IGBP_IGBC_API_REASON=fixing old tests

Change-Id: I70943093652516b8b083a8c46c82d9ddbea56695