[nullsafe] Add missing `android.os.Build` string constants (#1402)
[nullsafe] Add missing `android.os.Build` string constants (#1402)

Summary:
All of those constants are backed by `android.os.Build.getString()` method, and always use the static string constant `android.os.Build.UNKNOWN` as fallback.
Here is the code in latest master:
https://android.googlesource.com/platform/frameworks/base/+/refs/heads/master/core/java/android/os/Build.java#1342
Introduced and unchanged since 2009
https://android.googlesource.com/platform/frameworks/base/+/9066cfe9886ac131c34d59ed0e2d287b0e3c0087/core/java/android/os/Build.java#82

I think it's safe to say that all of those constants are null safe.

Please see [CONTRIBUTING.md](./CONTRIBUTING.md) for how to set up your development environment and run tests.

Pull Request resolved: https://github.com/facebook/infer/pull/1402

Reviewed By: jvillard

Differential Revision: D26750342

Pulled By: mityal

fbshipit-source-id: d7a9c94b7

jvillard/infer,jvillard/infer,facebook/infer,jvillard/infer,jvillard/infer,facebook/infer,facebook/infer,jvillard/infer,facebook/infer,facebook/infer,jvillard/infer,jvillard/infer,facebook/infer,facebook/infer