Create super-resolution demo for TensorFlow

[AzizZayed]

Description

This is a demo of an image enhancement GAN model called ESRGAN for TensorFlow.

[codecov-commenter]

Codecov Report

Merging #1049 (280abdd) into master (a2233b7) will increase coverage by 0.03%.
The diff coverage is 50.00%.

@@             Coverage Diff              @@
##             master    #1049      +/-   ##
============================================
+ Coverage     70.00%   70.03%   +0.03%     
- Complexity     5213     5229      +16     
============================================
  Files           510      511       +1     
  Lines         23255    23343      +88     
  Branches       2489     2493       +4     
============================================
+ Hits          16279    16348      +69     
- Misses         5647     5664      +17     
- Partials       1329     1331       +2     

Impacted Files	Coverage Δ
api/src/main/java/ai/djl/Application.java	56.36% <50.00%> (-0.25%)	⬇️
...ai/djl/tensorflow/engine/javacpp/JavacppUtils.java	64.94% <0.00%> (-2.80%)	⬇️
.../main/java/ai/djl/tensorflow/engine/TfNDArray.java	84.34% <0.00%> (-0.89%)	⬇️
...ain/java/ai/djl/tensorflow/engine/TfNDArrayEx.java	71.32% <0.00%> (-0.53%)	⬇️
...src/main/java/ai/djl/mxnet/engine/MxNDArrayEx.java	87.58% <0.00%> (-0.20%)	⬇️
...c/main/java/ai/djl/ndarray/internal/NDArrayEx.java	94.87% <0.00%> (ø)
...rc/main/java/ai/djl/sentencepiece/SpProcessor.java	77.27% <0.00%> (ø)
...rc/main/java/ai/djl/sentencepiece/SpTokenizer.java	63.63% <0.00%> (ø)
...ain/java/ai/djl/tensorflow/engine/TfNDManager.java	88.28% <0.00%> (ø)
...n/java/ai/djl/tensorflow/engine/TfSymbolBlock.java	88.65% <0.00%> (ø)
... and 6 more

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