Manta: libcamera2: prevent HAL crash when ZSL stream freed

This is a hardening band-aid to prevent HAL crash. Crash results in
Inaccessible camera hardware requiring a reboot of the device to recover.

NB: With Current GoogleCamera.app: Camera to Video switch, snapshots are
all green (blank). Workaround, switch to video mode, exit Camera application
and re-enter before running video where one expects to take snapshots as well.

Bug: 15408128
Change-Id: I1e6057069cace0e46e367f76f4a91f6b1f5459a5
1 file changed