Merge changes from topic "nnapi-op-resolver"
* changes:
Regenerate tests with the recent changes
Add new op SLICE
Add float16 support for ARGMAX and ARGMIN
Replace uses of kOperationNames[type] with getOperationName(type)
Add OperationValidationTest for ROI_POOLING and ROI_ALIGN.
Add new op ROI_POOLING.
Converts examples from global to static local.
Fix VTS validation test crashes.
Add new op ABS
Modify Gather to use OperationResolver
Add OperationResolver
Adds float16 support for DEPTHWISE_CONV_2D.
Adds float16 support for STRIDED_SLICE.
Adds float16 support for size/shape operations.
Support inputs with different quantization parameters in CONCATENATION
Fix types and add missing tests
