VTS: Create libhwc_aidl_test out of HWC VTS

[Why]
VTS tests targeting HWC depend on wrapper and helpers that are very
well done and beneficial to other tests outside of VTS that are also
targeting HWC.
Instead of rewriting all these helpers in a new effort to test HWC using
Cuttlefish, a common library for HWC AIDL tests would be beneficial.

[How]
Take out all the helpers out of the VTS directory and create a new
libhwc_aidl_test directory that other tests can reference.
Also, remove any mention of VTS out of them because they're not longer
directly related to VTS.

Merge Difference:
Teardown API has been updated based on ag/31493518 to standarize the API
between aosp and ag and avoid potential conflicts between
libhwc_aidl_test clients.

Bug: b/384710755   , b/383783834
Test: atest VtsHalGraphicsComposer3_TargetTest
Flag: TEST_ONLY
Merged-In: Icaff0c50186d7b016e1d1822e084bf12001fe5be
Change-Id: Ice9f4df5499f4d7869a17d370367cac1c18898a7