Update docs for https://github.com/facebook/react-native/pull/17747

[msand]

Update docs for facebook/react-native#17747

[react-native-bot]

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[hramos]

Thanks, let's come back to this when the PR is merged.

[hey99xx]

Wait how does this commit makes sense without updating build.gradle of RN simultaneously?

This is changing

Android SDK version 23 27 (compileSdkVersion in build.gradle)

and

SDK build tools version ~23.0.1~~ 26.0.2 (buildToolsVersion in build.gradle)

But if you look at the relevant part of build.gradle the numbers there are still are

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"

So I think merging this PR as it is will only create confusion, because the docs will suggest Android tools that have a mismatch with what RN actually uses.

Edit: The other PR at facebook/react-native@43fdacc#diff-22bd14e85636c66689f1a94a02a56b22R4 still has mismatch with this doc PR (26.0.2 vs 27.0.3).

[msand]

@hey99xx I had updated and force-pushed to the branch in the PR in RN, and am waiting for more feedback facebook/react-native#17747 (comment)
Haven't updated this PR to reflect those changes in versions here yet.

[msand]

But, the instructions about build tool versions could probably be removed completely, as the new gradle version will pick one itself depending on compatibility.

[cpojer]

It seems like this is outdated now and we'll need a new PR with the latest versions for everything. Sorry that it took so long to get back to this.