Add VTS tests for Context Hub HAL 1.1

Extract some common functionality and add a new test for the newly-added
method in HAL v1.1.

Bug: 135951924
Test: atest VtsHalContexthubV1_0TargetTest \
            VtsHalContexthubV1_1TargetTest
Change-Id: I1cd335d4972bc3242245b2379a7cfa42d1c683a6