hwc2: hwc2test fixes

Fixes the following hwc2 tests

Hwc2Test.GET_DISPLAY_ATTRIBUTE_invalid_attribute
Hwc2Test.GET_DISPLAY_ATTRIBUTE_bad_config
Hwc2Test.SET_ACTIVE_CONFIG_bad_config
Hwc2Test.GET_DOZE_SUPPORT_bad_display

Change-Id: I457ca4ddc14fcb5b3017588fd186f444625b7010
CRs-Fixed: 2028719
2 files changed