[scripts] Update setup-react-android to fallback sdkmanager (#19345)

[setup] Update Android setup scripts & docs (#13108)

[scripts] Update setup-react-android based on my recent experience

[android] Fixed NDK not installed when running `setup:native` (#6685)

When running `$yarn setup:native`, it may happen that the sdkmanager cannot be executed (`sdkmanager: command not found`) and th

[android] Fixed NDK not installed when running `setup:native` (#6685)

When running `$yarn setup:native`, it may happen that the sdkmanager cannot be executed (`sdkmanager: command not found`) and the Android NDK is not installed. This happens when your bash_profile already contains the Android SDK path (ANDROID_HOME),but not the `${sdk}/tool/bin` path.

Checking whether `../tools/bin` is in the path is tricky and sketchy, instead this PR therefore makes the script more resilient by using the absolute path to reference the `sdkmanager`. Fixes #6617

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Updated README and CONTRIBUTING (#5603)

* Updated contributing

* Added contributing guide

* Updated docs from feedback

* Updated contributing

* Update download-dependencies.sh

* Updat

Updated README and CONTRIBUTING (#5603)

* Updated contributing

* Added contributing guide

* Updated docs from feedback

* Updated contributing

* Update download-dependencies.sh

* Update CONTRIBUTING.md

* Update CONTRIBUTING.md

* Update CONTRIBUTING.md

* Update CONTRIBUTING.md

* Moved code standards to a new guide

* Added TOCs

* Fixed TOCs

* Update CONTRIBUTING.md

* Updated setup scripts

* Updated setup scripts

* Update CONTRIBUTING.md

* Update CONTRIBUTING.md

Co-Authored-By: James Ide <[email protected]>

* Update CONTRIBUTING.md

Co-Authored-By: James Ide <[email protected]>

* Update CONTRIBUTING.md

* Update CONTRIBUTING.md

* Update README.md

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