Camera2: Tests: Release streams after HAL is unloaded

This fixes a segfault in the HAL where it was trying to write to a locked buffer
that disappeared from underneath it.

Any users of CameraModuleFixture should now call SetUp/TearDown explicitly.
Other classes remain unchanged until we need a custom TearDown order for them.

Change-Id: I9aa8c2d86492a76f2c01c1ad4cbe0cf91e5c7916
3 files changed