Handle logical camera devices properly

- HighPriorityCameraClient test case is not executed against logical
  camera devices because clients are not allowed to change camera
  parameters via logical cameras.
- CameraStreamExternalBuffering test case closes logical camera device
  explicitly, to avoid any influence on following test scenarios.

Bug: 319165229
Test: atest VtsHalEvsTargetTest
Change-Id: I734d701a2056ab84fe74179b083c3f6c5463447b