Add more test methods to IMemoryTest

Add haveSomeMemoryBlock to test transport of the hidl_memory_block.
Add set(hidl_memory) & get(IMemoryToken) to test IMemoryToken

Test: hidl_test
Bug: 68295540
Change-Id: I08bcfae256de9db7dd647cde0ccbee214b598f47
5 files changed