am 5615ca19: docs: a lot of revision and expansion of the hello view tutorials includes new screenshots for some tutorials and a new sample images zip file

Merge commit '5615ca1979caa79041bf16a2cae49f9cfadd7ee5' into eclair-plus-aosp

* commit '5615ca1979caa79041bf16a2cae49f9cfadd7ee5':
  docs: a lot of revision and expansion of the hello view tutorials