Merge "Make retrieving SMPTE2094-10 metadata optional."

 * This is an enum that defines the common types of gralloc 4 buffer metadata. The comments for

 * each enum include a description of the metadata that is associated with the type.

 *

 * IMapper@4.x must support getting the following standard buffer metadata types. IMapper@4.x may

 * support setting these standard buffer metadata types as well.

 * IMapper@4.x must support getting the following standard buffer metadata types, with the exception

 * of SMPTE 2094-10 metadata. IMapper@4.x may support setting these standard buffer metadata types

 * as well.

 *

 * When encoding these StandardMetadataTypes into a byte stream, the associated MetadataType is

 * is first encoded followed by the StandardMetadataType value. The MetadataType is encoded by

        ASSERT_NO_FATAL_FAILURE(bufferHandle = mGralloc->allocate(descriptorInfo, true));

        hidl_vec<uint8_t> vec;

        ASSERT_EQ(Error::NONE, mGralloc->get(bufferHandle, metadataType, &vec));

        const auto result = mGralloc->get(bufferHandle, metadataType, &vec);

        if (metadataType == gralloc4::MetadataType_Smpte2094_10 && result == Error::UNSUPPORTED) {

            GTEST_SKIP() << "getting metadata for Smpte2094-10 is unsupported";

        }

        ASSERT_EQ(Error::NONE, result);

        ASSERT_NO_FATAL_FAILURE(decode(descriptorInfo, vec));

    }