[PyTorch] update pytorch build instruction on android

[lanking520]

Description

Support android build

[codecov-commenter]

Codecov Report

Merging #1630 (e55bca4) into master (bb5073f) will decrease coverage by 1.21%.
The diff coverage is 62.20%.

@@             Coverage Diff              @@
##             master    #1630      +/-   ##
============================================
- Coverage     72.08%   70.87%   -1.22%     
- Complexity     5126     5434     +308     
============================================
  Files           473      507      +34     
  Lines         21970    23769    +1799     
  Branches       2351     2589     +238     
============================================
+ Hits          15838    16847    +1009     
- Misses         4925     5630     +705     
- Partials       1207     1292      +85     

Impacted Files	Coverage Δ
api/src/main/java/ai/djl/modality/cv/Image.java	69.23% <ø> (-4.11%)	⬇️
...i/djl/modality/cv/translator/BigGANTranslator.java	21.42% <ø> (-5.24%)	⬇️
...odality/cv/translator/BigGANTranslatorFactory.java	33.33% <0.00%> (+8.33%)	⬆️
...nslator/InstanceSegmentationTranslatorFactory.java	14.28% <0.00%> (-3.90%)	⬇️
.../modality/cv/translator/YoloTranslatorFactory.java	8.33% <0.00%> (-1.67%)	⬇️
...i/djl/modality/cv/translator/YoloV5Translator.java	5.69% <0.00%> (ø)
...odality/cv/translator/YoloV5TranslatorFactory.java	8.33% <0.00%> (-1.67%)	⬇️
...pi/src/main/java/ai/djl/ndarray/BytesSupplier.java	54.54% <0.00%> (-12.13%)	⬇️
api/src/main/java/ai/djl/ndarray/NDArray.java	78.40% <ø> (+1.13%)	⬆️
...ain/java/ai/djl/ndarray/index/dim/NDIndexPick.java	100.00% <ø> (ø)
... and 241 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 46d3479...e55bca4. Read the comment docs.