Update Android template to have a namespace declaration

[cortinico]

Description

See this issue for the full report on why this is needed:

• [Android] Upcoming changes for libraries in React Native 0.73 react-native-community/discussions-and-proposals#671

Let's update bob whenever is possible so that libraries organically get this change out.

Packages

• create-react-native-library
• react-native-builder-bob

Selected options

See above.

Link to repro

react-native-community/discussions-and-proposals#671

Environment

See above.

[atlj]

Should we add an if statement to check the React Native version and apply it only if it's 0.73 or newer than 0.73, or is it safe to apply unconditionally? Would this work on React Native 0.72? If we are not sure I can test it before committing.

[cortinico]

Nope it can't be added unconditionally. It should be applied only for 0.71+

[atlj]

OK, thanks. We can add a version check if it's newer than 0.71, and we can specify the namespace 👍