Bump the Android Docker image to 6.0 (for NDK 23)

[cortinico]

Summary:
This bumps the Docker image for React Native Android to 6.0
shipping the NDK 23 with it, finalizing all the work needed
to support NDK 23.

Changelog:
[Internal] [Changed] - Bump the Android Docker image to 6.0 (for NDK 23)

Differential Revision: D40675449

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D40675449

[github-actions]

	Warnings
⚠️	🔒 package.json - Changes were made to package.json. This will require a manual import by a Facebook employee.

Generated by 🚫 dangerJS against 4acf7f8

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
ios	-	universal	n/a	--

Base commit: e9b89b5
Branch: main

[pull-bot]

PR build artifact for 3d70629 is ready.
To use, download tarball from "Artifacts" tab in this CircleCI job then run yarn add <path to tarball> in your React Native project.

[pull-bot]

PR build artifact for 3d70629 is ready.
To use, download tarball from "Artifacts" tab in this CircleCI job then run yarn add <path to tarball> in your React Native project.

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	6,991,873	-70,210
android	hermes	armeabi-v7a	6,368,346	-98,363
android	hermes	x86	7,404,364	+27,686
android	hermes	x86_64	7,268,333	-77,141
android	jsc	arm64-v8a	8,858,653	-60,448
android	jsc	armeabi-v7a	7,596,967	-88,619
android	jsc	x86	8,916,473	+47,668
android	jsc	x86_64	9,399,771	-59,753

Base commit: e9b89b5
Branch: main

[pull-bot]

PR build artifact for 4acf7f8 is ready.
To use, download tarball from "Artifacts" tab in this CircleCI job then run yarn add <path to tarball> in your React Native project.

[pull-bot]

PR build artifact for 4acf7f8 is ready.
To use, download tarball from "Artifacts" tab in this CircleCI job then run yarn add <path to tarball> in your React Native project.

[kelset]

[react-native-bot]

This pull request was successfully merged by @cortinico in 8b8a5e0.

^{When will my fix make it into a release? | Upcoming Releases}