WIP: Make MPS default device for macOS M1

[frankfliu]

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Currently MPS has many limitations:

1. mapLocation cannot be used to load model onto MPS
2. module that serialized with MPS device cannot be loaded as is, it can only be loaded when mapLocation set to CPU and GPU
3. Cannot convert a MPS Tensor to float64 dtype as the MPS framework doesn't support float64
4. Observed crash in .toDevice(): _ZN2at6native3mps13copy_cast_mps

This PR is just used as a reference, will make MPS default device when it become stable

[codecov-commenter]

Codecov Report

Base: 72.08% // Head: 69.61% // Decreases project coverage by -2.47% :warning:

Coverage data is based on head (e3fdeb0) compared to base (bb5073f). Patch coverage: 68.42% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2044      +/-   ##
============================================
- Coverage     72.08%   69.61%   -2.48%     
- Complexity     5126     5964     +838     
============================================
  Files           473      597     +124     
  Lines         21970    26510    +4540     
  Branches       2351     2884     +533     
============================================
+ Hits          15838    18456    +2618     
- Misses         4925     6664    +1739     
- Partials       1207     1390     +183     

Impacted Files	Coverage Δ
api/src/main/java/ai/djl/modality/cv/Image.java	69.23% <ø> (-4.11%)	:arrow_down:
...rc/main/java/ai/djl/modality/cv/MultiBoxPrior.java	76.00% <ø> (ø)
...rc/main/java/ai/djl/modality/cv/output/Joints.java	71.42% <ø> (ø)
.../main/java/ai/djl/modality/cv/output/Landmark.java	100.00% <ø> (ø)
...main/java/ai/djl/modality/cv/output/Rectangle.java	72.41% <0.00%> (ø)
...i/djl/modality/cv/translator/BigGANTranslator.java	21.42% <0.00%> (-5.24%)	:arrow_down:
...odality/cv/translator/BigGANTranslatorFactory.java	33.33% <0.00%> (+8.33%)	:arrow_up:
.../cv/translator/InstanceSegmentationTranslator.java	0.00% <0.00%> (-86.59%)	:arrow_down:
...nslator/InstanceSegmentationTranslatorFactory.java	7.14% <0.00%> (-11.04%)	:arrow_down:
.../cv/translator/SemanticSegmentationTranslator.java	0.00% <0.00%> (ø)
... and 511 more

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