Sunsetting rules_android WORKSPACE support circa Dec 2027

[ted-xie]

rules_android roughly follows Bazel's support model. Currently (Nov 2026) we support:

• Bazel 10.x (rolling releases and RCs)
• Bazel 9.x
• Bazel 8.x
• Bazel 7.x

Bazel 7.x will be deprecated in Dec 2026, one month from now. Next year, Bazel 8.x will be deprecated. Bazel 8 is the last release to include WORKSPACE support, so rules_android will also stop supporting WORKSPACE around that time.

Note that this does not mean that on Dec 1, 2027, all rules_android WORKSPACE builds will stop working. We will just stop testing for WORKSPACE (thus cutting our test corpus in half), and eventually we will remove vestigial code needed to keep WORKSPACE compatibility alive.